TASK DEFINITION: In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
PROBLEM: Problem: how many times digit 5 is used while writing numbers from 100 to 1000 ?
Options: a ) 648 , b ) 300 , c ) 252 , d ) 225 , e ) 290

SOLUTION: e

PROBLEM: Problem: how many halves are there in 9 - fourth ?
Options: a ) 8 , b ) 4.5 , c ) 3.2 , d ) 7 , e ) 3

SOLUTION: b

PROBLEM: Problem: the mean of 30 values was 180 . it was detected on rechecking that one value 155 was wrongly copied as 135 for the computation of the mean . find the correct mean .
Options: a ) 151 , b ) 149 , c ) 152 , d ) 148 , e ) 180.67

SOLUTION:
e