The expression (3f + 12) represents the number of apples in a shop, where f is the number of baskets. The total number of apples, when f = 3, is .

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Solution

The correct option is B 21
The given expression is 3f + 12

If f = 3,

3f + 12 = 3(3) + 12

= 9 + 12

= 21

Hence, the total number of apples, when f = 31, is 21.

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