
A bit confusing.thank you.
A bit confusing.thank you.
Boys Girls Total
Before 90 48 138
Left u u 138-2u
After 90-u 48-u
20% (=1/5) of remaining students are girls.
(1/5)(138-2u) = 48 – u <——– x 5 on both sides
138 -2u = 240 – 5u
3u = 102
u = 34
Hence remaining students in the canteen = 138 – 2(34) = 70
PS: Please click ” Accept Answer” if the answer is correct.
Hi Prettyhomework,
This answer is correct, I only made a typo error in writing 90 as 98 earlier
Ooh… I’m starting to appreciate model drawings 🙂