The personnel department of a company has records which show the following analysis of its 200 engineers in terms of age groups and degress. Age Under 30 90 30-40 20 Over 40 40 Total 150 Bachelors degree only Masters degree Total 100 50 50 200 iii. 10 30 10 50 If one engineer is selected at random, find the probability that: he has only a bachelor's degree; i. ii. he has a masters degree given that he is over 40 years; (3 marks) he is under 30 given that he has only a bachelor's degree (3 marks) (2 marks)