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Ludmilka [50]
3 years ago
10

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
Mathematics
1 answer:
MAXImum [283]3 years ago
6 0

Answer:

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

The probability of a blue is  \frac{4}{10+r}  

The probability of a red is  \frac{r}{10+r}  

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

\frac{4}{10+r} × \frac{r}{10+r}  =  [tex]\frac{4r}{100+20r+ r^{2} /[tex]

Step-by-step explanation:

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