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Quick
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A. 248
B. 128
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E. None of these
Recent Answer : :
297
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Recent Answer : :
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A. 14 sec.
B. 15 sec.
C. 16 sec.
D. 17 sec.
Recent Answer : :
17 secs
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Out of 10 persons, 4 are graduates; so, (10 – 4) = 6 are under-graduates.
If there is no restriction, any three can be chosen from the ten in (10C3) = 120 ways.
Now, if all three chosen are under-graduates; it can take place in (6C3) = 20 ways.
Therefore, the probability that there will be no graduate among the three chosen = (20 / 120) = (1 / 6).
Therefore, the probability that there will be at least one graduate among the three chosen = {1 – (1 / 6)} = (5 / 6) = 0.8333.