Question

There are 5 blue marbles, 2 red marbles, 1 orange marble, and 2 green marbles in a bag. Once a marble is drawn, it is replaced. Find the probability of selecting a blue marble, and then an orange marble.

Answer 1

There are 10 marbles in total.

The probability of selecting a blue marble is 5/10 or 50% and the chance of selecting an orange marble is 1/10 or 10%.

Answer 2

1/20

Explanation:

5 blue marbles, 2 red marbles, 1 orange marble, and 2 green marbles = 10 marbles

P( blue) = blue marbles / total marbles

=5/10 = 1/2

We replace the marble

5 blue marbles, 2 red marbles, 1 orange marble, and 2 green marbles = 10 marbles

P(orange) = orange marbles / total

= 1/10

P(blue, replace, orange) = 1/2 * 1/10

= 1/20