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P5 Mathematics

Question post on Thu, 21/04/2022 4:42pm

Hello, can anyone help this question please…urgent..thanks

SavingPrivateTutor · Answer 1 · Post on Mon, 25/04/2022 11:20am

SavingPrivateTutor · Answer 2 · Post on Mon, 25/04/2022 11:20am

SavingPrivateTutor

Post on Mon, 25/04/2022 11:20am

Adwin · Answer 3 · Post on Fri, 22/04/2022 12:05am

Adwin · Answer 4 · Post on Fri, 22/04/2022 12:05am

Adwin

Post on Fri, 22/04/2022 12:05am

ChiefKiasu · Answer 5 · Post on Thu, 21/04/2022 9:59pm

Err… I can only do it by equations…

Let G be the number of girls that left the hall.

(3/5) 120 – G = (4/7) (120 – G)

72 – G = (4/7) 120 – (4/7) G

72 – (4/7)120 = (3/7)G

G = (7/3)72 – (7/3)(4/7)120 = 168 – (4/3)120 = 168 – 160 = 8 #