Question

In a school 5/8 of the total students are boys if there are 720 girls find the no of boys in the school

Answer 1

Answer:

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Step-by-step explanation:

Fraction of boys  = 5 8 =58 Fraction of girls  = 1 − 5 8 = 3 8 =1−58=38 Number of girl  = 240 =240 Number of girls = Total students  × 3 8 ×38 ⇒ ⇒ 240 = Total students  × 3 8 ×38 ⇒ ⇒ Total students = 240  ÷ ÷  3 8 38 = 240 × 8 3 =240×83 = 240 × 8 3 =240×83 = 1920 3 = 640 =19203=640 Total students  = 640 =640 Number of boys = Total students - Number of girls = 640 − 240 = 400 =640−240=400 Number of boys = = 400

Answer 2

Answer:

Fraction of boys \(=\frac{5}{8}\)

Fraction of girls \(=1-\frac{5}{8}=\frac{3}{8}\)

Number of girl \(=240\)

Number of girls = Total students \(\times\frac{3}{8}\)

\(\Rightarrow\) 240 = Total students \(\times\frac{3}{8}\)

\(\Rightarrow\) Total students = 240 \(\div\) \(\frac{3}{8}\)

\(=240\times\frac{8}{3}\)

\(=\frac{240\times8}{3}\)

\(=\frac{1920}{3}=640\)

Total students \(=640\)

Number of boys = Total students - Number of girls

\(=640-240=400\)

Number of boys \(=\) 400

Step-by-step explanation:

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