Question

Mr. jagmohan calculated the average of 10 ‘three digit numbers'. but due to mistake he reversed the digits of a number and thus his average increased by 29.7. the difference between the unit digit and hundreds digit of that number is

Answer 1

Answer:

Step-by-step explanation:

Total sum = 29.7×10=297

Now,

100x+10y+z-(100z+10y+x)=297

=>100x-x+z-100z=297

=>99(x-z)=297

=>x-z=3

Answer 2

Answer:

With reversed digits, the average increased by 29.7

Hence, total sum=29.7*10=297

Let the number be abc with c being one's digit, b being tens digit and a being hundreds digit

Therefore, by questions statement

100c+10b+a-(100a+10b+c)=297

99c-99a=297

c-a=3

Hence the difference between unit and hundreds digit is 3

Step-by-step explanation: