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Vijay wrote 4 different letters to send to 4 different addresses. For each letter, he prepared one envelope with its correct address. If the 4 letters are to be put into the 4 envelopes at random, in how many ways can we put the letters so that only two of the letters goes to the right envelopes? |
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Answer» Vijay wrote 4 different letters to send to 4 different addresses. For each letter, he prepared one envelope with its correct address. If the 4 letters are to be put into the 4 envelopes at random, in how many ways can we put the letters so that only two of the letters goes to the right envelopes? |
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