On a certain day,500 students are cross classified according to age groups and mars scored in...

On a certain day,500 students are cross classified according to age groups and mars scored in the quiz

		age group
marks		below 81	18-21	22 plus
	less than 51	30	31	25
	51-70	60	40	46
	71-90	80	20	100
	91-100	26	2	40

a)state and explain any two non- mutually exclusive events.

b)state and explain any two mutually exclusive events

c) Calculate the probability that a randomly selected student:

i) Scored 95%

ii)is aged 23 years

iii) is aged 1 years or scored 75%.

iv) scored 44 % and is aged 19 years. ( 3 marks)

d. Given that a randomly selected student scored 60%, calculate the probability that the student is aged 20 years.

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Expert Solution

orchestra answered 1 year ago

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