In how many ways 4 letters can be posted in two post boxes?

Answer Posted / karthika

Assume 1st box 4 letter and 2nd box no letter,
1st box 1 letter and 2nd box 3 letter,
1st box 2 letter and 2nd box 2 letter,
1st box 3 letter and 2nd box 1 letter,
1st box not post and 2nd box 4 letter,
1st box 3 letter and 2nd box 1 letter,

so totally 6ways

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