Question

The number of six digits numbers that can be formed from the digits $1,2,3,4,5,6$ & $7$. So, that digit do not repeat and the terminal digits are even is :

• A. $144$
• B. $72$
• C. $288$
• D. $720$

Answer 1

The correct option is D $720$

We have seven digits as $1,2,3,4,5,6,7$ No.of six digit numbers are as

$6\times 5\times 4\times 3\times 2\times 1=30\times 24=720$