Question

Mary is making a party mix to bring to school. She believes that the perfect ratio of pretzels to peanuts is 3 to 5. If Mary knows that she is going to use 65 peanuts in the mix, how many pretzels will she need?

Answer 1

39 pretzels

Explanation:

let 'p' = # pretzels needed

3/5 = p/65

cross-multiply to get:

5p = 195

p = 195/5

p = 39