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'.

[EX Q]: Problem: students at a school were on average 180 cm tall . the average female height was 170 cm , and the average male height was 184 cms . what was the ratio s of men to women ?
Options: a ) 5 : 2 , b ) 5 : 1 , c ) 4 : 3 , d ) 4 : 1 , e ) 3 : 1
[EX A]: a

[EX Q]: Problem: if the average ( arithmetic mean ) of a and b is 110 , and the average of b and c is 170 , what is the value of a c ?
Options: a ) 120 , b ) 100 , c ) 100 , d ) 135 , e ) it can not be determined from the information given
[EX A]: a

[EX Q]: Problem: how many odd 3 - digit integers greater than 800 are there such that all their digits are different ?
Options: a ) 40 , b ) 56 , c ) 72 , d ) 81 , e ) 104
[EX A]:
c