At a game of billiards, A can give B 15 points in 60 and A can give C to 20 points in 60. How many points can B give C in a game of 90?  Choose the correct option
A) 30 points  B) 20 points  C) 10 points  D) 12 points  E) 22 points
a:b=60:45   a:c=60:40   b/a *a/c=45/60 *60/45=45/40=90/80 so 10 points   ANSWER:10 points
<result>C</result>
At a game of billiards, A can give B 15 points in 60 and A can give C to 20 points in 60. How many points can B give C in a game of 90?