Question

QUESTION IS IN ATTACHMENT NEED STEP BY STEP EXPLANATION.
➡answer should come 525
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Answer 1

• No of Girls in the School = 2/5 × 1500 = 2 × 300 = 600 Girls
• No of Boys in the School = 1500 - 600 = 900 Boys
• No of Boys wear Spectacles = 30/100 × 900 = 30 × 9 = 270 Boys waer Spectacles

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Answer 2

$Total \: number \: of \: girls \: in \: the \: school \: = \: 1500 \\Girls \: percentage \: = \: 50 \: perent \\ Number \: of \: Girls \: = \frac{50}{100} \times 1500 = \\ \bold{750 \: students \: are \: girls} \\ \\ Rest \: percent \: are Boys, \\ So \: Boys \: are \: 100-50= 50 \: percent. \\ Number \: of \: Boys = \frac{50}{100} \times 1500 = \\ \bold{750 \: boys}$

$\frac{2}{5} of \: girls \: wear \: spectacles = \frac{2}{5}×750= 300 girls$

30% of boys wear spectales = $\frac{30}{750}×750= 225 boys$

TOTAL STUDENTS WEAR SPECTALES =

300 girls + 225 boys

= 525 students