You have 13 blue and 11 red marbles in a bag. You randomly choose two marbles. What is the probability
that both marbles are blue?

You have 13 blue and 11 red marbles in a bag.

You randomly choose two marbles.

The probability  that both marbles are blue (1st one is blue and 2nd one is also blue): P = (13/24) x (13/23) = 0.31

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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step-by-step explanation: