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Question Number 31289 by mondodotto@gmail.com last updated on 05/Mar/18

Answered by MJS last updated on 05/Mar/18

1^(st)  white 2^(nd)  red + 1^(st)  red 2^(nd)  white  (5/8)×(3/7)+(3/8)×(5/7)=((15)/(28))

$$\mathrm{1}^{\mathrm{st}} \:\mathrm{white}\:\mathrm{2}^{\mathrm{nd}} \:\mathrm{red}\:+\:\mathrm{1}^{\mathrm{st}} \:\mathrm{red}\:\mathrm{2}^{\mathrm{nd}} \:\mathrm{white} \\ $$$$\frac{\mathrm{5}}{\mathrm{8}}×\frac{\mathrm{3}}{\mathrm{7}}+\frac{\mathrm{3}}{\mathrm{8}}×\frac{\mathrm{5}}{\mathrm{7}}=\frac{\mathrm{15}}{\mathrm{28}} \\ $$

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