Question

Assume that there are 6 color letters l1, l2, l3, l4, l5 and l6 are to be placed in 6 same color envelop e1, e2, e3, e4, e5 and e6 (one letter for each envelop). the number of possibilities to place exactly one letter in its correct envelop ________.

Answer 1

answer is = 1/6

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