Question

Violet bought 120 greeting cards at 3 for $2. Harry bought the same

number of greeting cards at 6 for $5. What was the difference between
the amounts that Violet and Harry paid?

Answer 1

Explanation:

Violet bought 120 at "3 for $2".

how many groups of 3 did she buy ?

120/3 = 40 groups of 3.

so, she paid 40×2 = $80.

Harry bought 120 at "6 for $5".

how many groups of 6 did he buy ?

120/6 = 20 groups of 6.

so, he paid 20×5 = $100.

that means Violet paid 100 - 80 = $20 less than Harry.