49. Lucky found $8.25 in pennies, nickels, dimes, and quarters while walking home from school one week. When she deposited this money in the bank, she noticed that she had twice as many nickels as pennies, 1 fewer dime than nickels, and 1 more quarter than nickels. How many quarters did Lucky find that week?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

Assume that there are x 1-cent coins. So you can list the equation $$ 0.01x+2x×0.05+( 2x-1)×0.1+( 2x+1)×0.25=8.25, the solution is x=10. So there are 2x+1=21 coins of $0.25 . Choose D.