CUET Mathematics 2023 30 May Shift 3 PYQs

If the mean of a binomial distribution is 12 and its standard deviation is 2, then the number of trials is :

Between 3 p.m. and 5 p.m. the average number of phone calls per minute coming into the helpline desk of a bank is 5. The probability that during one particular minute there will be only one phone call is :

In binomial distribution with $n = 10$ and $P = \frac{1}{3}$, the probability of the event that unequal number of failures and successes occur is :