Question

How many numbers of four digits can be formed
from the digits 3,4,5,6(no digit being repeated)?
Find the sum of all such numbers.​

Answer 1

Answer:

pls check the attachment

Answer 2

Step-by-step explanation:

4!

= 4×3×2×1= 24 or

There are 4 numbers to start with, Thus every number can form 6 combination.

so, 4 numbers ×6 combination = 24

Since there are 24 combination all the numbers appear in each combination

so, sum= 24(3+4+5+6)= 24×18=432