Question

A box contains 5 blue marbles, 3 black marbles and 2 red marbles of the same size and shape. A marble is selected at random from the box and then replaced. A second marble is then selected. What is the probability that a.Two red marbles
b. Two blue marbles or two black marbles c. One black marble and one red marble

Answer 1

Answer:

(a) =Total Balls=5+3+2=10

Probability of two red marble=2/10=1/5