Question

Customers at a gift shop bought 20 birthday cards, 25 Father's Day cards, 45 mothers day cards, and 35 thank you cards. Suppose 225 customers buy greeting cards. How many people would you expect to buy a father's day card next year?

A. 35
B. 28
C. 45
D. 100

Answer 1

D.

Explanation:

225 greeting cards

25 fathers day cards

How much would be expected to have fathers day cards be bought next year?

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Create a proportion of Fathers Day Cards bought and the amount of greeting cards bought.

`(45)/(100) = (x)/(225)`

You then would cross multiply, since we are finding x, let's isolate it. :

`(45*225)/(100 * x)`

`10,125 = 100x`

Divide both sides by 100 :

x = 101.25

We can round this to the nearest tenth, since the ones place is 1. It rounds down.

x = 100