Question

a) The ratio of total students to girls in a school is 7:4 and the number of
girls is 320. Find the number of boys in the school.​

Answer 1

Step-by-step explanation:

let 7:4=

no. of girls = 320 ;

so total students = x/320 = 7/4

so; 560/320

so total students = 560

boys = 240

Answer 2

✯ Answer ✯

Total number of boys = 560.

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✯ Solution ✯

Let the number of boys be x.

.

Writing the given ratio in the form of fraction.

$\\ \large \boxed{ \bf \dfrac{7}{4} = \frac{x}{320} }$

By cross multiplication :

→ 4x = 7 × 320

→ 4x = 2,240

→ $\bf\: x = \dfrac{2240}{4}$

→ x = 560

.

Therefore, the total number of boys = 560.

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✯ Finale Answer ✯

The number of boys in school = 560.