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If a denotes the number of permutations ...

If `a` denotes the number of permutations of `(x+2)` things taken all at a time, `b` the number of permutations of `x` things taken `11` at a time and `c` the number of permutations of `x-11` things taken all at a time such that `a=182b c ,` find the value of `xdot`
a) 10
b) 12
c) 15
d) 18

A

10

B

12

C

15

D

18

Text Solution

Verified by Experts

The correct Answer is:
B
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