A child has 2 pencil and 3 erasers. In how many ways he can take a pencil and an eraser?

588

885

858

None of these

If ⁿC15 = ⁿC6 then, the value of ⁿC21 is

0

1

21

None of these

In how many ways can 12 people be divided into 3 groups where 4 persons must be there in each group?

None of these

12!/(4!)³

Insufficient data

12!/{3! × (4!)³}

The number of combination of n distinct objects taken r at a time be x is given by,

n/2Cr

n/2Cr/2

nCr/2

nCr

Four dice are rolled. The number of possible outcomes in which at least one dice show 2, is

1296

671

625

585

The number of ways in which 8 distinct toys can be distributed among 5 children, is

58

85

8P5

5P5

The value of P(n, n – 1), is

n

2n

n!

2n!