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In a race of 20 bulls, the probabilities of winning the race by bull A, B and C are 1/4, 1/6 and 1/7, respectively, then what is the probability that one of the three bull will win the race?
1. 47/85
2. 47/84
3. 45/84
4. 46/84 

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Best answer
Correct Answer - Option 2 : 47/84

Given:
Total bulls = 20

Probability of winning A = 1/4

Probability of winning B = 1/6

Probability of winning C = 1/7

Calculation:

Probability of either of the cases are added when one of them has to occur

∴The probability of one of the three winning = (1/4) + (1/6) + (1/7) = 47/84 

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