Question

write all possible 2 digit numbers that can be formed by using the digits 2,3 and 4. Repetition of digits is not allowed. also find their sum.​

Answer 1

Answer:

198

Step-by-step explanation:

The given digits are 2,3,4and repetition of digits is not allowed.

Out of the given digits, the possible ways of choosing ways of choosing the two digits are

2,3;2,4;3,4

Using the digits 2 and 3, the numbers are 23 and 32

Similarly, Using the digits 2 and 4, the numbers 24 and 42

Using the digits 3 and 4, the numbers are 34 and 43

Hence all possible 2−digit numbers are 23,32,24,42,34,43

∴ Sum of above numbers

=23+34+32+24+43+42=198.