Gina has a jar of marbles that contains 7 blue marbles, 5 red marbles, and 8 green marbles. She randomly selects a marble, records the color, and places the marble back into the jar. She then selects another marble. What is the probability that Gina randomly selected two red marbles. ( fraction in simplest form )

The probability that Gina randomly selected two red marbles is 1/19

Explanation:

Total number of marbles = 7 + 5 + 8

                                          = 20

The probability of getting two red marbles in the fraction form is given as:

P(first red marble) = number of red marbles / total number of marbles

P(first red marble) =

P(second red marble) = number of red marbles after 1 white marble is removed / total number of marbles after 1 red marble is removed.

P(first red marble) =

P(two red marbles) = P(first) X P(second)

                              =

                              =

Therefore, the probability that Gina randomly selected two red marbles is 1/19

step-by-step explanation:

96 39 cause 135 -96=39 im smart (i used a calculater)