Question 20
The digits 1, 2, 3, 4 can form 24 four-digit numbers where every digit is used
exactly once. If these 24 numbers are arranged in ascending order, what is the
position of 3142?
1234,1243,...,4321
ist and 24th
exactly once. If these 24 numbers are arranged in ascending order, what is the
position of 3142?
1234,1243,...,4321
ist and 24th