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प्रश्न
Find total number of distinct possible outcomes n(S) of the following random experiment.
From a group of 4 boys and 3 girls, any two students are selected at random.
उत्तर
Two students are selected at random from a group of 4 boys and 3 girls (total 7)
2 students can be selected from a group of 7 students in 7C2 ways.
∴ n(S) = 7C2 = `(7xx6)/(2xx1)` = 21
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