Questions
A box contains tickets numbered from I to 20. Three tickets are drawn from the box with replacement. The probability that the largest number on the tickets is 7 is
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Correct option is D
Let X denote the largest number on the 3 tickets drawn Then, P(X≤7)=(7/20)3 and P(X≤6)=(6/20)3. Then, the required probability isP(X=7)=7203−6203Similar Questions
The odd against an event are 5 to 2 and the odds in favour of another disjoint event are 3 to 5. Then the probability that atleast one of the events will happen is
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