A class consists of $$80$$ students, $$25$$ of them are girls and $$55$$ are boys. If $$10$$ of them are rich and the remaining are poor and also $$20$$ of them are intelligent, then the probability of selecting an intelligent rich girl is

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Infinity Learn · Accepted Answer

Total number of the students is $$80$$. Total number of girls is $$25$$.Total number of boys is $$55$$.  There are $$10$$ rich, $$70$$ poor, $$20$$ intelligent students in the class. Therefore, required probability is $$14$$×$$18$$×$$2580=5512$$

A class consists of 80 students, 25 of them are girls and 55 are boys. If 10 of them are rich and the remaining are poor and also 20 of them are intelligent, then the probability of selecting an intelligent rich girl is

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