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There are 5 more girls than boys in a class.

If 2 boys join the class, the ratio of girls to boys will be 5:4. Find
(a) the number of girls in the class.
(b) the total number of pupils in the class.
(c) the probability of selecting a boy as the class perfect .

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1 answer

  1. (b+5)/(b+2) = 5/4
    b = 10
    B. 10+15 = 25

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