Mathematics - Permutation & Combination Question with Solution | TestHub

----- (5 blanks) $1^{\text{st }}$ blank can be filled in 9 ways

$2^{\text{nd }}$ blank can be filled in 9 ways $\_\_\_\_$ since repetition is allowed.

$3^{\text{rd }}$ blank can be filled in 9 ways

$4^{\text{th }}$ blank can be filled in 9 ways Now, we have to fill the

$5^{\text{th }}$ blank carefully such that the number is divisible by 3 . Add the 4 numbers in the first 4 blanks.