Probability & Statistics PYQ

A bag contains 3 red and 5 blue balls. Two balls are drawn at random without replacement. The probability that both are red is:

If X follows a Poisson distribution with P(X=1) = P(X=2) then the mean of the distribution is:

Three coins are tossed simultaneously. The probability of getting exactly two heads is:

In a binomial distribution with n=5 and p=1/3, the probability of exactly 2 successes is:

A bag contains 5 red and 3 blue balls. Two balls are drawn at random without replacement. The probability that both are red is:

The variance of the data 2, 4, 6, 8, 10 is:

The standard deviation of 5 observations 1, 2, 3, 4, 5 is:

If P(A)=0.4, P(B)=0.5 and P(A∩B)=0.2 then P(A|B) is:

The mean of first n natural numbers is:

A die is thrown 6 times. The probability of getting at least one six is: