There are four letters and four directed envelopers. The number of ways in which all the letters can be put I the wrong envelope is

There are four letters and four directed envelopers. The number of way

1.	There are four letters and four directed envelopers. The number of ways in which all the letters can be put I the wrong envelope is
A.	8
B.	9
C.	16
D.	none of these
Answer» C. 16

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There are four letters and four directed envelopers. The number of ways in which all the letters can be put I the wrong envelope is

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