A certain toy store's revenue in November was 1/5 of its revenue in December and its revenue in ...
A certain toy store's revenue in November was 1/5 of its revenue in December and its revenue in January was 3/4 of its revenue in November, then the store's revenue in December was how many times the average (arithmetic mean) of its revenues in November and January?
Answer/Solution
6
Steps/Work
Let Dec rev =100
Then Nov rev is 1/5 (100) => 20
Therefore Jan rev = 3/4(Nov rev) = 3/4(20) => 15
Hence Dec rev = x*( Nov rev+Jan rev)/2
100 = x* (20+15)/2
x = 100/17.5 => 5.71=6
Ans) E
Then Nov rev is 1/5 (100) => 20
Therefore Jan rev = 3/4(Nov rev) = 3/4(20) => 15
Hence Dec rev = x*( Nov rev+Jan rev)/2
100 = x* (20+15)/2
x = 100/17.5 => 5.71=6
Ans) E