Question
Mathematics Question on permutations and combinations
If 11Pr=7920 and 11Cr = 330, then the value of r is equal to
A
2
B
3
C
4
D
5
E
6
Answer
4
Explanation
Solution
The correct option is (C) : 4
If 11Pr=7920 and 11Cr = 330, then the value of r is equal to
2
3
4
5
6
4
The correct option is (C) : 4