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there are 15 boys and 10 girls in your class. a faur member committee is to befromedfrom the student of your class. in how many ways this can be done if the comittee consists at least three girls

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with 3 girls:
= C(10,3) x C(15,1) = ..
with 4 girls
= C(10,4) x C(15,0) =

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