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Questloh 4Ratio of boys and girl is 4:5, when100 girl left, the ratio becomes 6:7,find number of boysa) 1200b) 600c) 800d) of these |
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Answer» let x = the multiplierthen4x = original number of boysand5x = original number of girls:4x/5x-100=6/7Cross multiply7(4x) = 6(5x-100)28x = 30x - 600600 = 30x - 28x600 = 2xx = 600/2x = 300 is the multiplierthen4(300) = 1200 boys of these is the answer c) 800is a correct answer 1200 no. of the boys is 1200 no. of boy is 1200 there for the answer is 1200 |
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