SOLUTION: There are 357 seniors in Harris High School. The ratio of boys to girls is 7:10. How many boys are in the senior class? (A). 117.
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Question 467472: There are 357 seniors in Harris High School. The ratio of boys to girls is 7:10. How many boys are in the senior class? (A). 117. (B). 147. (C). 107. (D). 210 Answer by algebrahouse.com(1659) (Show Source):
7 boys / 17 total = x boys / 357 total {set up a proportion}
17x = 7(357) {cross-multiplied}
17x = 2499 {multiplied 7 by 357}
x = 147 {divided both sides by 17}
