How do i solve this ik the answer is 10 though

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

25 ! i need asap! ! ill mark brainliest!

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.