Number of four lettered words that can be formed from letters of word ' MAYANK ' such that b

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Gujarati

Hindi

6.Permutation and Combination

normal

The number of four lettered words that can be formed from the letters of word '$MAYANK$' such that both $A$'s come but never together, is equal to

A

$18$

B

$36$

C

$72$

D

$9$

Solution

$MYNK$
$^4{C_2}×2! × ^3{C_2}×1 = 36\,\,(x – x – x)$

Standard 11

Mathematics

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(JEE MAIN-2019)