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Tomas found a bag of 100 AA batteries. Tomas found that only 3 out of 20 batteries were good. Based onTomas' attempts results so far, how many of the batteries in the bag could he expect to be good?

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Tomas found a bag of 100 AA batteries. Tomas found that only 3 out of 20 batteries were good. Based on

Tomas' attempts results so far, how many of the batteries in the bag could he expect to be good?

we know that

total AA batteries ------> 100

only 3 out of 20 batteries were good.

Applying proportion

3/20=x/100

solve for x

x=3*100/20

x=15

answer is 15 batteries

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