The 120 employees at a factory were asked which would best i

The 120 employees at a factory were asked which would best improve their working life: better promotion prospects, higher pay, or more respect from other staff. The results are tabulated below.

a) What is the probability that an employee selected more respect?

b) What is the probability that an employee is a clerical worker or selected better promotion prospects?

c) What is the probability that a manual employee selected higher pay?

d) What is the probability that an employee selected more respect and is a manager?

e) What is the probability that a managerial employee selected higher pay?

Solution

a)

20 / 120 = 0.1667

b)

30 / 120 + 15 / 120 = 0.375

c)

10 / 80 = 0.125

d)

20 / 40 = 0.5

e)

40 / 120 = 0.333