Meena bakes 5 dozen cookies for the school’s bake sale. She sells 2 dozen cookies to her biology teacher, Mr. Stone. Her friend Brock buys 7 cookies, and her friend Katy buys twice as many as Brock. How many cookies does Meena have left?
Think hard. Detailed solution:
15
Meena bakes a total of 5 x 12 = 60 cookies.

Mr.

Stone buys 2 x 12 = 24 cookies.

Brock buys 7 cookies, so Katy buys 2 x 7 = 14 cookies.

Meena sells a total of 24 + 7 + 14 = 45 cookies.

She has 60 - 45 = 15 cookies left.

.

The answer is 15