Suppose that 20% of all copies of a particular textbook fail a certain binding strength test. Let X be the number among 5 randomly selected copies that fail the test. Find ,the cumulative distribution...

Suppose that 20% of all copies of a particular textbook fail a certain binding
strength test. Let X be the number among 5 randomly selected copies that fail the
test. Find ,the cumulative distribution function, the expected
values, the variance and the standard deviation