Question

There are 150 employees in a factory. （2/3）of the employees are males. Then, 20 male employees and 10 female employees are resigned. A employee is chosen at random from the remaining employees. Find the probability of choosing a female employee.​

Answer 1

2/3 of 150 = 100

So there were 100 male employees initially.

100-20 = 80 males
50-10 = 40 females

80+40= 120 employees in total, 40 of them being females.

Probability of choosing a female employee = 40/120 = 4/12 = 2/6 = 1/3