The answer is 246:157.
Step by Step:
Group A:
First, figure out 1/5 of the people in group A. ( 615/5 = 123 )
Find 2/5 ( the amount of people who lost ) ( 123*2 = 246 )
Group B:
They received the same amount of fuel cards, so you take 526 - 369 ( 3/5 of the last group, or the winners, which is the amount of cards they received ) = 157.
√15y*3√81y
√15y*√729y
√10935y^2
√729*15*y2
27y√15
12/18
6/9
2/3
Simply in common factor you know and keep doing it
12/18
BCD:6
2/3