How many integers between 0 and 1000 DO NOT contain the integer 1
Choose one.
A) 727
B) 728
C) 758
D) 748
E) 792

Rationale: from 1 to 99 = 19 integers having 1 from 101 to 199 = all are having 1 similarly 201 - 299 , 301 - 399 , 401 - 499 , . . . . . so on , will have 19 integers having 1 answer = 1000 - ( 19 * 9 + 99 + 2 ) / / 2 is added for 100 and 1000 = 728 answer : b
Answer: B