There are four blue marbles, an unknown number of red (r) marbles, and six yellow marbles in a bag. which expression represents the probability of randomly selecting a blue marble, replacing it, and then randomly selecting a red marble

There are a total of 4 + r + 6 marbles in the bag

The probability of a blue is    

The probability of a red is    

The probability of choosing a blue, replacing it and then a red is

×  =  [tex]\frac{4r}{100+20r+ r^{2} /[tex]

Step-by-step explanation:

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step-by-step explanation:

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