Question

A class consists of 1/2 ​freshmen, 1/8 ​sophomores, and 1/8 ​juniors; the rest are seniors. What fraction of the class is​ seniors?

Answer 1

Answer:

A class consists of 1/4 freshmen,1/5 sophomores, and 1/10

juniors; the rest are seniors. What fraction of the class is

seniors?

Add all the three

(1/4)+(1/5)+(1/10)

LCM = 20

(5+4+2)/20

=11/20

..

1-(11/20) will be seniors

LCM = 20

(20-11)/20

=9/20 are seniors