Brady has 3 Red Sox rookie cards among his 300 baseball cards.
According to the question,
We have the following information:
Brady has 300 baseball cards.
5% of them are Boston Red Sox cards.
So, we have 5% of 300:
(More to know: we know that of means multiplication in mathematical terms. Hence, the word of has been replaced by multiplication in the following expression.)
5/100 * 300
5*3
15
So, we have 15 Boston Red Sox cards.
Now, it is given that one-fifth of Brady’s Red Sox cards are rookie cards.
So, we have the following expression:
15*1/5
15/5
3
Hence, the correct option is A.
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