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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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Keynote
nCr equals to
The probability of selecting atleast one item = 1 − (Probability of selecting...
Read the passage carefully and answer the following questions. Now India’s children have a right to receive at least eight years of education, the gnawing question is whether it will remain on paper or become a reality. One hardly needs a reminder that this right is different from the others enshrined in the Constitution, that the beneficiary-a six year old child cannot demand it, nor can she or he fight a legal battle when the right is denied or violated. In all cases, it is the adult society which must act on behalf of the child. In another peculiarity, where a child’s right to…
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