Question

A bag contains 8 blue, 2 black and 5 red balls. If a ball is drawn at random from the bag, what is the probability that it will be a black ball?

Answer 1

Answer:

if set A

A={8 blue, 2black, 5 red}

therefore A={3}

therefore probability of black ball

B={2 black ball}

therefore B={1}

therefore p(B)=n(A)/n(B)

p(B)=3/1