Question

The number of 6 digit numbers that can be made with the digits 1,2,3 and 4 and having exactly two pairs of digits​

Answer 1

Correct option is C)

Correct option is C)The number of ways 2 digits can be selected which will be in pairs

=( 42 )

Thus, we have 4 digits (2 pairs of alike digits) and 2 more different digits

Thus, we have 4 digits (2 pairs of alike digits) and 2 more different digitsTherefore, no. of different 6 digit number =( 42 )× 2!×2!6!

Thus, we have 4 digits (2 pairs of alike digits) and 2 more different digitsTherefore, no. of different 6 digit number =( 42 )× 2!×2!6!

Thus, we have 4 digits (2 pairs of alike digits) and 2 more different digitsTherefore, no. of different 6 digit number =( 42 )× 2!×2!6! =1080

Thus, we have 4 digits (2 pairs of alike digits) and 2 more different digitsTherefore, no. of different 6 digit number =( 42 )× 2!×2!6! =1080Hence, option 'C' is correct.