Question

which is greater the sum of 4 1/2 and 2 1/5 or the sum of 3 2/3 and 3 1/2
By how much is greater?​

Answer 1

Step-by-step explanation:

1,3,5,7→ four digits

∴ number of numbers =4!=24

We have to find the sum of these 24 numbers suppose 7 is in the unit place,

then the remaining three can be arranged as 3!=6 ways.

Similarly, other digits can occupy the first place in 6 ways.

Hence, even due to unit place of all the 24 digits number =6(7+5+3+1) units =96 units.

Again suppose 7 is in the second place i.e., tens place and it will be so in 6 numbers.

Similarly, each digit will be in tens place of all the 24 numbers.

=6(7+5+3+1)tens =96×10 units

Proceeding similarly for hundreds and thousands.

The sum=96(1+10+100+1000)=96×1111=106656