99 Percentile Qs Bank for JEE MainMathematicsProbability
A die is tossed 5 times. Getting an odd number is considered a success. Then the variance of distribution of success is
Options
- A8 3
- B3 8
- C4 5
- D5 4
Correct answer
D. 5 4
Step-by-step solution
p = 1 2 , q = 1 2 , where p & q are probabilities of success and failure. Here, n = 5 Variance = n p q = 5 × 1 2 × 1 2 = 5 4