There are 4 letters and 4 addressed envelopes.If the letters are inserted at random in the envelops, the chance that atleast one letter may be placed in wrongly addressed envelop is
A
124
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B
34
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C
2324
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D
16
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Solution
The correct option is C2324 Total no. of ways of placing the letter os that atleast are may be placed in wrongly addressed envelop =24−1
=23
Total no. of ways of placing the letter =4!=24
Chance that at least may be place in wrong envelope =2324