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: the mean of 50 observations was 36 . it was found later that an observation 48 was wrongly taken as 23 . the corrected new mean is : 
Options: a ) 36.5 , b ) 35 , c ) 34 , d ) 33 , e ) 32.5

SOLUTION: a

PROBLEM: Problem: find the number which multiplied by 15 is increased by 196 . 
Options: a ) 14 , b ) 20 , c ) 26 , d ) 28 , e ) 27

SOLUTION: a

PROBLEM: Problem: how many 4 digit number contain number 2 ? 
Options: a ) 3168 , b ) 3268 , c ) 3368 , d ) 3468 , e ) 3568

SOLUTION:
a