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There are 945 students in a school. Ratio of boys to girls in the school is 4 : 3 and fee of each girl is 20% lesser than a that of boy. If the sum of fees of boys and girls is Rs. 535680, then find the fee of 1 girl.1). Rs. 6202). Rs. 4963). Rs. 5164). Rs. 775 |
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Answer» Let US assume NUMBER of boys and girls in the school is 4x and 3x respectively. Total number of student = 4x + 3x = 7x = 945 (given) ⇒ x = 945/7 = 135 Number of boys = 4x = 4 × 135 = 540 Number of girls = 3x = 3 × 135 = 405 Let us assume fee of 1 BOY is Rs. Y Total Fees of 540 boys = Y × 540 = Rs. 540Y Fees of 1 girl = 80% of Y = 0.8Y Fees of 405 girls = 0.8Y × 405 = Rs. 324Y Sum of fees of boys and girls = 540Y + 324Y = 864Y = Rs. 535680 ⇒ Y = 535680/864 = 620 Fee of a girl = 0.8 × 620 = Rs. 496 |
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