SAT Math Multiple Choice Practice Question 426: Answer and Explanation
9. Fifteen percent of the coins in a piggy bank are nickels and five percent are dimes. If there are 220 coins in the bank, how many are not nickels or dimes?
Correct Answer: B
B If 20% of the coins are either nickels or dimes, 80% are neither. 80% of 220 equals 176. Use your calculator or write it out and solve: