Question

Mrs. Santos is buying binders for the students in her class. She determined that 15 binders would cost $22.50.If all of the binders cost the same amount, which statement is true?

It will cost $12 for 18 binders.
It will cost $20 for 30 binders.
It will cost $42 for 28 binders.
It will cost $48 for 48 binders.

Answer 1

It will cost $42 for 28 binders. Is true

Answer 2

Option C It will cost $42 for 28 binders

Explanation:

Mrs. Santos determined that 15 binders would cost = $22.50

Therefore, 1 binder would cost = $1.50

Now we calculate each statement :

a. 18 binders will cost $12

= 18 × $1.50 = $27.00 (not correct)

b. 30 binders will cost $20

= 30 × $1.50 = $60.00 (not correct)

c. 28 binders will cost $42

28 × $1.50 = $42.00 (Correct)

d. 48 binders will cost $48

48 × $1.50 = $72.00 (not correct)

Option C It will cost $42 for 28 binders would be correct.