The following table displays a two-way classification, based on gender and employment status of a group of youths in a city

	Employed	unemployed
Male	240	80
Female	250	30

a)if a youth is selected at random from the group of youths, find the probability that the youth is

i.Unemployed

ii.Employed

iii.A female

b) Are the events employed and unemployed mutually exclusive?