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In a class there are 10 boys and 20 girl...

In a class there are 10 boys and 20 girls. The class teacher wants to select 1 boy and 1 girl to represent the class in a function. In how many can the teacher make this selection ?

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A boy can be selected in 10 ways A girl can be selected in 20 ways
`therefore` By F.P.C the number of ways of selecting 1 boy and 1 girl `=10xx20=200`.
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