A box has 100 pens of which 10 are defective. The probability that out of a sample of 5 pens drawn one by one with replacement and atmost one is defective, is
If , then n is equal to
12
20
26
6
B.
20
The probability distribution of X is
X | 0 | 1 | 2 | 3 |
P(X) |
0.3 | k | 2k | 2k |
The value of k is
0.7
0.3
1
0.14