Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each

of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of
trail mix should Mary buy to have enough trail mix without leftovers?

It would help if you proofread your questions before you posted them.

What is "one 25_ -pound bag"?

I assume it is not one 25-pound bag. If it is:

15 * 25 = ?

2/5 ×15= 6, 1 pound bags

To determine the number of 1-pound bags Mary should buy, you need to calculate the total amount of trail mix required to fill the 25-pound bags for all 15 members.

Each member will receive one 25-pound bag, so the total amount of trail mix needed is 25 pounds * 15 members = 375 pounds.

Since trail mix is sold in 1-pound bags, Mary needs to buy enough 1-pound bags to have a total weight of 375 pounds.

Thus, Mary should buy 375 1-pound bags of trail mix to have enough without leftovers.