The ratio of boys to girls at the movie is 4:7. If there are 21 girls, how many boys are at the movie?

b oys : g i r l s = 4 : 7 g i r l s = 21 t h ere f ore b oys : 21 = 4 : 7 21 b oys ​ = 7 4 ​ ∣ cross m y lt i pl y 7 b oys = 4 × 21 7 b oys = 84 ∣ d i v i d e b o t h s i d es b y 7 b oys = 84 : 7 b oys = 12 ​

Answered by Anonymous | 2024-06-10

7 x = 21 x = 3 4 x = 4 ⋅ 3 = 12 ​

Answered by konrad509 | 2024-06-10

There are 12 boys at the movie. This is calculated using the ratio of boys to girls (4:7) and the fact that there are 21 girls. By using cross-multiplication and solving for the number of boys, we find the answer to be 12.
;

Answered by Anonymous | 2024-09-04