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A box contains 2 washers, 3 nuts and 4 bolts. Items are drawn from the box at random one at a time without replacement. The probability of drawing 2 washers first followed by 3 nuts and subsequently the 4 bolts is
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2 315 -
1 630 -
1 1260 -
1 2520
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Correct Option: C
Given: Washers – 2, Nuts – 3, Bolts – 4,
Total– 9 objects
Hence probability of drawing two washers from 9 objects
= | = | 9C2 | 36 |
Probability of drawing, 3 nuts out of remaining 7 objects is
= | = 1 | 4C4 |
Probability of drawing 4 bolts out of remaining 4 bolts
∴ Required Probability = | × | × 1 = | 36 | 35 | 1260 |