If the probability of winning a match is 0.7, then what is the value of…
2021
If the probability of winning a match is 0.7, then what is the value of variance?
- A.
0.7
- B.
0.8
- C.
0.21
- D.
0.31
Attempted by 17 students.
Show answer & explanation
Correct answer: C
Variance for a Bernoulli distribution is calculated as: Variance = p * (1 - p)
Given success probability (p) = 0.7
Failure probability (1 - p) = 1 - 0.7 = 0.3
Variance = 0.7 * 0.3 = 0.21
Final Answer: Option 3