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Solution
Total number of marbles in the urn = 6 + 4 + 2 + 3 = 15
Total number of ways in which four marbles can be picked randomly from the urn = 15C4
Number of blue marbles = 4
Total number of marbles in the urn excluding blue...
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nCr equals to
The probability of selecting atleast one item = 1 − (Probability of selecting...
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