Between 100 and 199, there are 10 numbers with zeroes in ones place and hence, 90 numbers with zeroes in ones place between 100 and 999.



Between 100 and 199, there are 10 numbers with zeroes in tens place and hence, 90 numbers with zeroes in tens place between 100 and 999.



Hence, total zeroes between 100 and 999 is the sum of number of zeroes in ones place and number of zeroes in tens place.



That is, a =180.



Between 100 and 199, there are 10 fives in ones place and ten 5 in tens place. Hence, total fives between 100 and 199 is 20. Hence, between 100 and 999, there are (20×9)+100=280 fives(100 is added because of the hundred 5s that comes in 500–599 in the hundreds place).



Therefore, b = 280.



Similarly, the number of 8s will be same as the number of 5s. Therefore, c = 280.



Hence, b + c - a = 280 + 280 - 180 = 380.

Ans is 380

Please solve this question

Ans is 380 :)

Thanks

Nope nvm