Given mean and variance of a binomial: find n and p, then a probability
This type of question, asked 7 times: 3 May 2023 S2, 9 May 2023 S1, 9 May 2023 S2, 11 May 2024 S2, 11 Apr 2026 S1, 17 Apr 2026 S1, 19 May 2026 S1. All 7 questions below, oldest first.
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Question 1
3 May 2023 S2
109Let a random variable have a Binomial distribution with mean 8 and variance 4. If , then is equal toTap an option to check your answer.
Question 2
9 May 2023 S1
138If the mean and the variance of Binomial variate X are 2 and 1 respectively, then the probability that X takes a value greater than or equal to one isTap an option to check your answer.
Question 3
9 May 2023 S2
142If the mean and the variance of a Binomial variate X are 2 and 1 respectively, then the probability that X takes a value greater than one is equal toTap an option to check your answer.
Question 4
11 May 2024 S2
111Let a random variable X have a Binomial distribution with mean 8 and variance 4. If , then K isTap an option to check your answer.
Question 5
11 Apr 2026 S1
98Let . If and , then the probability of getting at most one success is .....Tap an option to check your answer.
Question 6
17 Apr 2026 S1
99If the mean and the variance of a binomial variate X are 1 and 0.75 respectively, then which of the following is true?Tap an option to check your answer.
Question 7
19 May 2026 S1
99The sum and product of mean and variance of a binomial distribution are 3 and 2 respectively. Then,Tap an option to check your answer.