80
90
110
120
Correct answer is D
nP5nC5=n!(n−5)!÷n!(n−5)!5!
= n!(n−5)!×(n−5)!5!n!=5!=120
Find the constant term in the binomial expansion of (2x2 + 1x2)\(...
Find the coefficient of x4 in the binomial expansion of (2+x)6...
The 3rd and 6th terms of a geometric progression (G.P.) are 83 and 6481 re...
Given that n=10 and ∑d2=20, calculate the Spearman's rank correlation coeffic...
An exponential sequence (G.P.) is given by 8√2, 16√2, 32√2, ... . Find the n\(^{th...
Two functions f and g are defined by f:x→3x−1 and g:x→2x3, evaluate \(fg(-2...