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Permutations — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsPermutations1 Mark
Question
In how many ways can $4$ letters be posted in $5$ letter boxes$?$
✓

Answer

Total number of letters $= 4$
Total number of letter boxes $= 5$
$\therefore$ The number of ways in which 4 letters posted in 5 letters boxes $= 5 \times 5 \times 5 \times 5$
$= 5^4$ 

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