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A consignment of 20 picture tubes contains 5 defectives. Two tubes are selected one after the other at random. The probability that both…

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Placement Tests

TCS

UPSC

Four friends namely Rahul, Ravi, Rajesh and Rohan contested for a dairy milk chocolate. To decide which friend will get the chocolate they decided to throw two dice. Every friend was asked to choose a number and if the sum of the numbers on…

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CAT

GMAT

IBPS

If the probability of rain on any given day in Pune city is 50%, then what is the probability that it rains on exactly 3 days in a 5 day…

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CAT

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One hundred identical coins each with probability p of showing up heads are tossed. If 0p and the probability of heads showing on 50 coins…

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