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प्रश्न
What is the probability that a student chosen at random out of 3 girls and 4 boys is a boy?
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उत्तर
Given, total children = 7 = 4 boys and 3 girls.
So, favourable outcomes for a day = 4
Total number of possible outcomes = 7
∴ Probability = `"Favourable outcomes"/"Total number of possible outcomes" = 4/7`
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