If a and b are unit vectors, then angle between a and b for to be unit vectori
45°
60°
90°
30°
D.
30°
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
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