Question

a bag contains 5 white ball 7 black ball 3 ball drawn at random find probability all are white and 1 white and 2 black

Answer 1

Total cases -- 12c3
1 ) favourable cases -- 5c 3
Probability -- 5c3/ 12c3
Solve and get answer
2)favourable cases -- 5c1 × 7c2
Probability ----- 5c1×7c2/ 12c3
Solve and get answer
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