- The personnel department of a company has records which show the following analysis of its 200 engineers.

AgeBachelor DegreeMaster DegreeTotalUnder 30901010030 to 40203050Over 40401020Total15050200

If one engineer is selected at random from the company, find

1. The probability that he has only a bachelor’s degree.

2. The probability that he has a master’s degree, given that he is over 40.

The probability that he is under 30, given that he has only a bache