1.

Out of 9 outstanding students in a college, thereare 4 boys and 5 girls. A team of four students is to be selected for a quizprogramme. Find the probability that two are boys and two are girls.

Answer»


Answer :`(""^(4)C_(2)xx^(5)C_(2))/(""^(9)C_(4))=(10)/(21)`


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