MPSC PYQ

MPSC Rajyaseva 2017 CSAT — Question 61

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एका वर्गामध्ये 15 मुले आणि 10 मुली आहेत. तीन मुलांची यादृच्छिकपणे (random) निवड करावयाची आहे. एक मुलगी आणि दोन मुले यांची निवड होण्याची शक्यता ___ आहे.

1)21/46✓ Correct
2)25/117
3)1/50
4)3/25

Total persons = 25. Choosing 3 boys out of 15 is C(15,3). Choosing 1 girl and 2 boys is C(10,1) * C(15,2) / C(25,3).

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