Question

A Typist while typing the numbers from 600 to 799 mistakenly he typed 8 every time in place of 6. So the total number of times he has typed 8 is:

Answer 1

Answer:

he typed 138 times eight mistakenly

Answer 2

Answer:

180 times mistakenly 8 typed.

Step-by-step explanation:

600 - 799

In 600-699 hundred places instead of 6 the 8 typed = 100 times

            at ten's place = 10 times

             at one's place = 10 times

now, 8 also been  typed right so in

       =>  at ten's place = 10 times

       =>      at one's place = 10 times

600-699 = 100+10+10+10+10 = 140

In 700-799 hundred place 8= 0 (8 not possible)

6 replaced by 8 => at ten's place = 10 times

                               at one's place = 10 times

8 typed   =>         at ten's place = 10 times

                              at one's place = 10 times

here, 10+10+10+10= 40

Total => 140 + 40 = 180