The incidence of occupational disease is such that on the average 20% of workers suffer from it. If 10 workers are selected at random, find the probability that
exactly 2 workers suffer from the disease.

The incidence of occupational disease is such that on the averatge 20% of workers suffer from it. If 10 wrkers are selected at random, find the probability that not more that 2 workers suffer from the disease.

A recent survey found that the edges ages of workers in a factory as follow. If a person is selected at random, find the probability that the person is

A recent survey found that the edges ages of workers in a factory as follow. If a person is selected at random, find the probability that the person is

He is suffering from a terminal disease.

The incidence of occupational desease in an industry is such that the workers have a 20% chance of suffering from it. What is the probability that out of six workers 4 or more will catch the disease?

Coal workers always suffers from black lung disease .

A recent survey shows that the ages of 200 workers in a factory is distributed as follows : If a worker is selected at random , find the probability that the selected worker is (i) 40 years or more (ii) under 40 years (iii) having an age from 30 to 39 years (iv) under 60 but over 39 years .