If there are 10 positive real numbers n1 < n2, n3 .... < n10 How many – McqOptions

MCQOPTIONS

1.	If there are 10 positive real numbers n₁ < n₂, n₃ .... < n₁₀ How many triplets of these numbers (n₁, n₂, n₃) (n₂, n₃, n₄), ... can be generated such that in each triplet the first number is always less than the second number and the second number is always less the third number ?
A.	45
B.	90
C.	120
D.	180
Answer» D. 180

Discussion

No Comment Found

Related MCQs

The total number of arrangements of the letters in the expression a<sup>3</sup>b<sup>2</sup>c<sup>4</sup> when written at full length is ?
If there are 10 positive real numbers n<sub>1</sub> < n<sub>2</sub>, n<sub>3</sub> .... < n<sub>10</sub> How many triplets of these numbers (n<sub>1</sub>, n<sub>2</sub>, n<sub>3</sub>) (n<sub>2</sub>, n<sub>3</sub>, n<sub>4</sub>), ... can be generated such that in each triplet the first number is always less than the second number and the second number is always less the third number ?
If <sup>n</sup>C<sub>r - 1 </sub> = 36, <sup>n</sup>C<sub>r</sub> = 84 and <sup>n</sup>C<sub>r + 1 </sub> = 126 then ?
If <sup>35</sup>C<sub>n + 7</sub> = <sup>35</sup>C<sub>4n - 2</sub>, then all the values of n are given by ?
If <sup>2n + 1</sup>P<sub>n - 1</sub> : <sup>2n - 1</sup>P<sub>n</sub> = 3 : 5, then n is equal to ?
If <sup>n</sup>P<sub>r</sub>= 720 <sup>n</sup>C<sub>r</sub> than the value r is ?
If <sup>56</sup>P<sub>r + 6</sub> : <sup>54</sup>P<sub>r + 3</sub> = 30800 : 1 then the value of r is ?
If <sup>n+2</sup>C<sub>8</sub> : <sup>n- 2</sup>P<sub>4</sub> = 57 : 16 then the value of n is ?
Find the value of <sup>5</sup> P<sub>2</sub>.
If <sup>50</sup>c<sub>r</sub> = <sup>50</sup>c<sub>r + 2</sub> find r.