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 there sum​

Answer 1

Answer:

Step-by-step explanation:

In a 2 digit num,

there are 2 spaces to be filled,and there are no repitation allowed

so in first place any one of the 3 numbrs cn be filled: 2 or 3 or 4

hence there is 3 possilities for first place of number.

in second place,anyone of 2  digits only can be placed.as repitation is not alowed

hence 3*2 possibilities =6 ways of numbers

they are

23 ,24 , 32 ,34 ,42  ,43

hence the sum is

198

Answer 2

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