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Maths Puzzle
Numerical Ability
Permutation and Combination
Party of 5 women and 5 men. A committee consists of 3 women and 2 men
The total number of ways to form this committee.
Read Solution (Total 7)
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- 5C3 x 5C2 = 100 ways
- 11 years agoHelpfull: Yes(10) No(0)
- nCr = n! / (n - r)! r!
For 5C3, the above evaluates to:
nCr = 5!/ (5 - 3)! 3!
nCr = 5!/ 2! 3!
nCr = (5 * 4 * 3 * 2 *1) / (2 * 1)(3 * 2 * 1)
nCr = 120 / (2 * 6)
nCr = 120 / 12
nCr = 10
For 5C2, the above evaluates to:
nCr = 5!/ (5 - 2)! 2!
nCr = 5!/ 3! 2!
nCr = (5 * 4 * 3 * 2 *1) / (3 * 2 * 1)(2 * 1)
nCr = 120 / (6 * 2)
nCr = 120 / 12
nCr = 10
so 10*10 = 100 ways - 11 years agoHelpfull: Yes(3) No(0)
- nCr = n! / (n - r)! r!
For 5C3, the above evaluates to:
nCr = 5!/ (5 - 3)! 3!
nCr = 5!/ 2! 3!
nCr = (5 * 4 * 3 * 2 *1) / (2 * 1)(3 * 2 * 1)
nCr = 120 / (2 * 6)
nCr = 120 / 12
nCr = 10
For 5C2, the above evaluates to:
nCr = 5!/ (5 - 2)! 2!
nCr = 5!/ 3! 2!
nCr = (5 * 4 * 3 * 2 *1) / (3 * 2 * 1)(2 * 1)
nCr = 120 / (6 * 2)
nCr = 120 / 12
nCr = 10
so 10*10 = 100 ways - 11 years agoHelpfull: Yes(2) No(0)
- 5c3*5c2=100
using the formula :ncr=n!/(n-r)!r!
where n=5 and c=3
and c=2
- 11 years agoHelpfull: Yes(1) No(0)
- 5c3*5c2 using the formula n!/r!(n-r)!
- 11 years agoHelpfull: Yes(0) No(0)
- 5C3 x 5C2 = 100 ways
- 10 years agoHelpfull: Yes(0) No(0)
- 5c3*5c2 =100
- 9 years agoHelpfull: Yes(0) No(0)
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