Question

5 letter are to be placed into 5 envelops such that no envelop is empty .find the sample space​

Answer 1

Answer:

120 ways

Step-by-step explanation:

let first take a letter and we can place it in any 5 envelopes

after placing it in any envelope ,now second letter can be placed in any of remaining 4 envelopes in 4 ways

in the same way for 3rd letter 3 times, 2nd letter 2 times and last letter for 1 way is happenend

SO for easy fromula is N!=5!=5*4*3*2*1=120 ways

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