A Maths quiz consists of 10 questions were given to a group of students. Each question...

A Maths quiz consists of 10 questions were given to a group of students. Each

question has 4 choices. Grade A is given to the students managed to get 70% marks

and above. According to the compiled data, 45% of students managed to get grade

A.

(a) What is the probability that exactly 3 of a random sample of 5 the students were

grade A?

(b) What is the probability that not more than 7 of a random sample of those 15

students were grade A?

(c) Among the candidates, one student has not studied and decided to guess the

answers to every questions. Find the probability that the candidate will get

grade A in the quiz.

Expert Solution

orchestra answered 2 years ago

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