Curioustab

Home » Aptitude » Permutation and Combination

If nP 3 = 9240, then find the value of n.

20
21
22
23

Correct Answer: 22

Explanation:

ⁿP₃ = 9240 ⇒ n! / (n-3)! = 9240
⇒ n(n - 1)(n - 2) = 9240
⇒ n(n - 1)(n - 2) = 22 x 21 x 20
∴ n = 22

← Previous Question Next Question→

More Questions from Permutation and Combination

In how many different ways, can the letters of the word 'INHALE' be arranged?
In how many ways, the letters of the word 'ARMOUR' can be arranged?
In how many ways, the letters of the word 'STRESS' can be arranged?
In how many ways, the letters of the word 'BANKING' can be arranged?
In how many different ways, the letters of word 'FINANCE' can be arranged?
In how many different ways, can the letters of the word 'VENTURE' be arranged?
In a meeting between two countries, each country has 12 delegates. All the delegates of one country shake hands with all delegates of the other country. Find the number of handshakes possible?
How many straight lines can be drawn from 15 non-collinear points?
A library has 'a' copies of one book, 'b' copies of each of two book, 'c' copies of each of three books and single copy of 'd' book. The number of ways in which these books can be distribute is?
The number of triangles that can be formed by choosing the vertices from a set of 12 points, seven of which lie on the same straight line, is?

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion