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MCQOPTIONS
This section includes 3246 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
The A.M. of the numbers 1, 3, 5, ……. (2n – 1) is |
| A. | n2 |
| B. | n + 1 |
| C. | n |
| D. | 2n |
| Answer» D. 2n | |
| 452. |
The Standard Deviation for two observations is |
| A. | square of their difference. |
| B. | half of their absolute difference |
| C. | their absolute difference |
| D. | twice of their absolute difference |
| Answer» C. their absolute difference | |
| 453. |
The correlation coefficient between two variables x and y is |
| A. | sum of two regression coefficients. |
| B. | Arithmetic Mean of two regression coefficients. |
| C. | Harmonic Mean of two regression coefficients. |
| D. | Geometric Mean of two regression coefficients. |
| Answer» E. | |
| 454. |
If y = 3x + 30 and mean of x is 20, then the mean of y is |
| A. | 90 |
| B. | 80 |
| C. | 70 |
| D. | 100 |
| Answer» B. 80 | |
| 455. |
The median of the numbers 94, 33, 86, 68, 32, 80, 48 and 70 is |
| A. | 68 |
| B. | 69 |
| C. | 64 |
| D. | 70 |
| Answer» C. 64 | |
| 456. |
Given the table: Class Interval 10 – 15 15 – 20 20 – 25 25 – 30 30 – 35 Frequency 5 7 4 6 8 The class mark for the second class is |
| A. | 27.5 |
| B. | 17.5 |
| C. | 12.5 |
| D. | 32.5 |
| Answer» C. 12.5 | |
| 457. |
If the sum of squares of the deviations of 10 observations taken from mean 50 is 250,then C.V is |
| A. | 10% |
| B. | 12% |
| C. | 20% |
| D. | 15% |
| Answer» B. 12% | |
| 458. |
If the Harmonic Mean of 2, a, 8 be 24/7, the value of a is 17 |
| A. | 4 |
| B. | 6 |
| C. | 12 |
| D. | 9 |
| Answer» B. 6 | |
| 459. |
A.M of 40 observations of a variable is 25 and S.D is 4. The sum of squares of allobservations is |
| A. | 25640 |
| B. | 26540 |
| C. | 24560 |
| D. | 26450 |
| Answer» B. 26540 | |
| 460. |
For a frequency distribution coefficient of skewness = 0.6; mean = 172 and mode = 163.The value of the variance is |
| A. | 169 |
| B. | 215 |
| C. | 196 |
| D. | 225 |
| Answer» E. | |
| 461. |
If for a symmetrical distribution 1st and 3rd quartiles are respectively 16 and 22, then theMedian of the distribution is |
| A. | 20 |
| B. | 18 |
| C. | 24 |
| D. | 19 |
| Answer» E. | |
| 462. |
If Mean = 50 cm and C.V. = 60%, then the S.D. is |
| A. | 25 cm |
| B. | 30 cm |
| C. | 28 cm |
| D. | 20 cm |
| Answer» C. 28 cm | |
| 463. |
The G.M of 3 and 24 with weight 2 and 1 respectively is |
| A. | 8 |
| B. | 4 |
| C. | 6 |
| D. | 9 |
| Answer» D. 9 | |
| 464. |
When Var (x) = 2.25, Var (y) = 1 and Cov (x, y) = 0.9, then correlation coefficient is |
| A. | 0.45 |
| B. | 0.8 |
| C. | 0.6 |
| D. | 0.75 |
| Answer» D. 0.75 | |
| 465. |
The measure of central tendency of a statistical data which takes into account all thedata |
| A. | Median |
| B. | Mean |
| C. | Mode |
| D. | Range |
| Answer» C. Mode | |
| 466. |
The quartile deviation of the following data 12, 10, 17, 14, 19, 21, 27, 30, 32, 38, 34 is |
| A. | 11 |
| B. | 18 |
| C. | 9 |
| D. | 16 |
| Answer» D. 16 | |
| 467. |
For two mutually exclusive events A and B if P(A) = 3/4 and P(B) = 1/6, then P(A or B) is |
| A. | 11/12 |
| B. | 5/12 |
| C. | 7/8 |
| D. | 1/8 |
| Answer» B. 5/12 | |
| 468. |
Two variables x and y are given by the relation y = 3x – 2. If the mode of x be 5, themode of y will be |
| A. | 13 |
| B. | 10 |
| C. | 15 |
| D. | 9 |
| Answer» B. 10 | |
| 469. |
The necessary diagram to compare among the various components or between a partand the whole is: |
| A. | Bar diagram |
| B. | Step diagram |
| C. | Pie diagram |
| D. | Histogram |
| Answer» D. Histogram | |
| 470. |
For two mutually exclusive events A and B, if P(A) = 0.4 and P(B) = 0.3, then P (A or B) is |
| A. | 0.6 |
| B. | 0.58 |
| C. | 0.7 |
| D. | 0.75 |
| Answer» D. 0.75 | |
| 471. |
For a frequency distribution mean = 68.2; median = 69 and coefficient of skewness ofthe distribution is – 0.6. The variance of the distribution is |
| A. | 9 |
| B. | 25 |
| C. | 36 |
| D. | 16 |
| Answer» E. | |
| 472. |
Two unbiased coins are tossed simultaneously. The problem of getting a head and atail is |
| A. | 1/4 |
| B. | 1/2 |
| C. | 1 |
| D. | ¾ |
| Answer» C. 1 | |
| 473. |
Standard Deviation (S.D) for two observations 1 and 4 is |
| A. | 1 |
| B. | 1.5 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 474. |
For two mutually exclusive events A and B, P (A U B) is equal: |
| A. | P(A) – P(B) |
| B. | P(A) + P(B) |
| C. | ½ [P(A) + P(B)] |
| D. | P(A) x P(B) |
| Answer» C. ½ [P(A) + P(B)] | |
| 475. |
The coefficient of skewness of a distribution is 0.4. Its S.D and mean are respectively 8and 30. The mode of the distribution is |
| A. | 26 |
| B. | 26.2 |
| C. | 26.4 |
| D. | 26.8 |
| Answer» E. | |
| 476. |
The variance of first 5 natural numbers is |
| A. | 3 |
| B. | 4 |
| C. | 8 |
| D. | 2 |
| Answer» E. | |
| 477. |
The Geometric Mean (GM) for the series 1, 3, 9 is |
| A. | 3 |
| B. | 2 |
| C. | 1/3 |
| D. | ½ |
| Answer» B. 2 | |
| 478. |
The mean deviation of the observations 3, 5, 9, 1 and 2 about their median is |
| A. | 2.4 |
| B. | 2.2 |
| C. | 3 |
| D. | 2.8 |
| Answer» C. 3 | |
| 479. |
The value of log7 7 is |
| A. | 0 |
| B. | - 1 7 |
| C. | 1/2 |
| D. | 1 |
| Answer» E. | |
| 480. |
If 3x – 1 – 3x – 3 = 8, then the value of (x2 – x + 4) is |
| A. | 10 |
| B. | 8 5 |
| C. | 12 |
| D. | 15 |
| Answer» B. 8 5 | |
| 481. |
The mean proportional between 2 and 8 is |
| A. | 4 |
| B. | 16 |
| C. | 3 |
| D. | 1 |
| Answer» B. 16 | |
| 482. |
P and Q are two non-empty sets. Given: n(P) = 12, n(Q) = 6 and n (P U Q) = 10. Then n (P ∩ Q) is |
| A. | 8 |
| B. | 9 |
| C. | 7 |
| Answer» B. 9 | |
| 483. |
A sum will be double itself at a simple interest p.a. in 8 years. The simple interest is |
| A. | 10% |
| B. | 10.5% |
| C. | 12% |
| D. | 12.5% |
| Answer» E. | |
| 484. |
If (x – 1), (x + 1) and (2x + 3) are in A.P, then the value of x is |
| A. | -2 |
| B. | 0 |
| C. | 2 |
| D. | 4 |
| Answer» C. 2 | |
| 485. |
If a = b2 = c3, then the value of loga(abc) is |
| A. | 13/3 |
| B. | 11/6 |
| C. | 8/3 |
| D. | 4 |
| Answer» C. 8/3 | |
| 486. |
Which term 128 is of the progression 1, 2, 4, 8, …….? |
| A. | 8th term |
| B. | 7th term |
| C. | 9th term |
| D. | 10th term |
| Answer» B. 7th term | |
| 487. |
If 5Cr – 3C2 = 7C1, then r is |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | both 2 and 3 |
| Answer» E. | |
| 488. |
The year by which a sum of rupees would be 1.21 times of itself at 10% per annum C.Iis |
| A. | 2 years |
| B. | 3 years |
| C. | 3.5 years |
| D. | 2.5 years |
| Answer» B. 3 years | |
| 489. |
If 2nP3 = 84. nP2, then the value of n is |
| A. | 16 |
| B. | 11 |
| C. | 9 |
| D. | 6 |
| Answer» C. 9 | |
| 490. |
Six years before the ratio of the ages of two sisters Mitali and Sonali is 2 : 3. If the presentage of Mitali is 30 years, then the present age of Sonali is |
| A. | 28 years |
| B. | 42 years |
| C. | 36 years |
| D. | 48 years |
| Answer» C. 36 years | |
| 491. |
The 7th term of the Arithmetic Progression (AP) 7, 10, 13, 16, …… is |
| A. | 28 |
| B. | 22 |
| C. | 25 |
| D. | 20 |
| Answer» D. 20 | |
| 492. |
p varies inversely as q. If p = 2 then q = 3. Find p if q = 2. |
| A. | 3 |
| B. | 4 |
| C. | 1 |
| Answer» B. 4 | |
| 493. |
A person deposits 2,000 at 6% p.a. simple interest for 3 years. The amount he willget back after 3 years is |
| A. | 2,300 |
| B. | 2,400 |
| C. | 2,360 |
| D. | 2350 |
| Answer» D. 2350 | |
| 494. |
y = A + B where A and B vary directly and inversely respectively with x; x = 1 when y =11 and x = 2 when y = 13. The value of y when x = 3 is |
| A. | 15 |
| B. | 17 |
| C. | 19 |
| D. | 20 |
| Answer» C. 19 | |
| 495. |
The value of logarithm of 1/10 to the base 10 is |
| A. | 1 |
| B. | -1 |
| C. | 10 |
| Answer» C. 10 | |
| 496. |
A man deposited a sum of money to a bank at 9% simple interest p.a. The total interestthat he will get at the end of 5 years is 1,620. The deposited amount is |
| A. | 6,000 |
| B. | 4,000 |
| C. | 3,600 |
| D. | 4,400 |
| Answer» D. 4,400 | |
| 497. |
The value of logarithm of 8 to the base 2 is |
| A. | 3 |
| B. | 0 |
| C. | 1 |
| D. | 2 |
| Answer» B. 0 | |
| 498. |
If p varies directly as q and if q = 2 then p = 4. If p = 2, the value of q is |
| A. | 1.5 |
| B. | 2 |
| C. | 1 |
| D. | 3 |
| Answer» D. 3 | |
| 499. |
Find the 10th term of the A.P 3, 6, 9, 12, 15, …………….. |
| A. | 20 |
| B. | 25 |
| C. | 23 |
| D. | 30 |
| Answer» E. | |
| 500. |
The mean proportional between 4 and 16 is |
| A. | 8 |
| B. | 10 |
| C. | 9 |
| D. | + 8 |
| Answer» E. | |