Question #N435
A store sells two types of cookies: chocolate chip and peanut butter. On Monday, the store sold 3 times as many chocolate chip cookies as peanut butter cookies. If the store sold a total of 120 cookies that day, how many chocolate chip cookies were sold?
A. 30
B. 40
C. 60
D. 90
Correct Answer is: D
Let x represent the number of peanut butter cookies sold. The store sold 3 times as many chocolate chip cookies as peanut butter cookies, so 3x represents the number of chocolate chip cookies sold. The total number of cookies sold is 120, so we can set up the equation: x + 3x = 120. Combining like terms, we get 4x = 120. Dividing both sides of the equation by 4, we get x = 30. Since 3x represents the number of chocolate chip cookies sold, the store sold 3 * 30 = 90 chocolate chip cookies.