Probability & Statistics Mock Tests

A bag contains 4 red and 5 green balls. Three balls are drawn at random. What is the probability that all three are red?

The probability that a leap year has 53 Sundays is:

If the mean and variance of a binomial distribution are 4 and 2 respectively, then the probability of getting exactly 1 success is:

The coefficient of variation of a distribution with mean 50 and standard deviation 10 is:

In how many ways can 5 different books be arranged on a shelf?

In a class of 60 students, 40% like football, 50% like basketball, and 25% like both. How many students like neither football nor basketball?

The mean of 50 observations was 36. It was found later that an observation 23 was wrongly taken as 52. What is the correct mean?

In a class of 60 students, 40 like math, 35 like physics, and 20 like both. How many students like neither math nor physics?