q: when car X pulled into the gas station, its gasoline tank was 1/3 full. How many litres of gasoline did the attendant add to gas tank?
i) attendant added enough to fill gas tank to 9/10 of its capacity
ii) when car pulled in, the gas tank had 32 litres of gasoline
a:
let g: gas tank in litres (g=1/3(x) + 2/3(x))
x: quantifier
i) 1/3 full=>2/3 empty
=>2/3*(x)=9/10*(g)
=> insuff
B, C, E
ii) 1/3*(x)=32
=>x=96
=>2/3*(x)=96
=>x=48*3=124
=> suff
is this a correct way to solve the prob? This prob is quite easy, but I get confused. Please help.
i) attendant added enough to fill gas tank to 9/10 of its capacity
ii) when car pulled in, the gas tank had 32 litres of gasoline
a:
let g: gas tank in litres (g=1/3(x) + 2/3(x))
x: quantifier
i) 1/3 full=>2/3 empty
=>2/3*(x)=9/10*(g)
=> insuff
B, C, E
ii) 1/3*(x)=32
=>x=96
=>2/3*(x)=96
=>x=48*3=124
=> suff
is this a correct way to solve the prob? This prob is quite easy, but I get confused. Please help.
Want to Beat GMAT.
Always do what you're afraid to do. Whoooop GMAT
Always do what you're afraid to do. Whoooop GMAT
