The probability that Arjun hits the fish’s eye in one try is 1/2. How many tries does he need so that the probability of hitting the fish’s eye atleast once is 0.9 ?

The probability that Arjun hits the fish’s eye in one try is 1/2. Ho

1.	The probability that Arjun hits the fish’s eye in one try is 1/2. How many tries does he need so that the probability of hitting the fish’s eye atleast once is 0.9 ?
A.	4
B.	3
C.	2
D.	1
E.	None of these
Answer» B. 3

Discussion

No Comment Found

Related MCQs

Reshma bought a hand bag for Rs. 2500. Later she marked up its price by 15% and she sold it at a discount of 6%. What is percentage profit earned by Reshma on this transaction?
In how many different ways can the letters of the word ‘OPTICAL’ be arranged so that be the vowels always come together?
In a city, 85% of the people use mobile phones. 60% of the mobile phone users use smartphones and 75% of the smartphones are 3G whereas only 20% of non-smartphones are 3G. If there are 120000 phones which are 3G phones, then what is the approximate population of the city?
A shopkeeper gives a discount of 10% on the marked price and then charges sales tax on the amount obtained. He charges a % sales tax up to Rs. 5000 and b% tax for orders with marked price more than Rs. 5000. If a customer pays Rs. 180 as sales tax when he purchases goods worth Rs. 4000 marked price, and Rs. 189 when he purchases goods worth Rs. 7000 as marked price, find the value of (a + b).
Ranu and Bhanu can separately do a piece of work in 18 days and 12 days respectively. They worked together for 6 days, after which Bhanu was replaced by Shivam. If the work was finished in next 2 days, then what is the number of days in which Shivam alone can do the work?
The average weight of 60% students of a class is 50% more than the remaining students. There are 25 students in the class. What is the total weight of the class if the average weight of the 60% students is 60 kg?
Inside a rectangular ground of dimensions 40m × 50m, a circular area of radius 14m is demarcated to install a ride. The remaining area is to be covered in tiles. If the cost of laying tiles is rupees 50 square meter, what is the total cost of laying tiles?..
Ratio of present age of X & Y is 4 : 3. At the time X & Y got married this ratio was 5 : 3. After 4 years this ratio became 9 : 7. How many years ago did X & Y got married?
A certain bank offers 8% rate of interest on the 1st year and 9% on the 2nd year in a certain fixed deposit scheme. If Rs. 2943 are received after investing for 2 years in this scheme, then what was the amount (in Rs) invested?
Rs. 160000 is divided into two equal parts. One part is invested in a scheme which gives 12% interest compounded annually for two years. The other part is invested in a scheme offering simple interest of 13% for 2 years. What is the difference between the interest earned on the two schemes?

The probability that Arjun hits the fish’s eye in one try is 1/2. How many tries does he need so that the probability of hitting the fish’s eye atleast once is 0.9 ?

Discussion

No Comment Found

Related MCQs

Reply to Comment