Question

How many 6 digit even numbers can be formed from digits 1 2 3 4 5 6 7 so that the digit should not repeat and the second last digit is even?
a)6480 b)320 c)2160 d)720; How many 6 digit even numbers can be formed from digits 1 2 3 4 5 6 7 so that the digit should not repeat and the second last digit is even?; a)6480 b)320 c)2160 d)720

Answer 1

the no would have 2 or 4 or 6 as 2nd last digit so we fix it

$6 \times 5 \times 4 \times 3 \times 1 \times 1 \times 3$

2160