Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Ask ManyTutors

Question

primary 5 | Maths | Percentage
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
J.Y.
J.Y.

primary 5 chevron_right Maths chevron_right Percentage chevron_right Singapore

Hi! i need help and explanation for this question. Thank you in advance!

Date Posted: 2 years ago
Views: 469
add a comment
sstrike
Sstrike
2 years ago
Answer：40

See 1 Answer

Ask ManyTutors
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
sstrike
Sstrike's answer
5361 answers (A Helpful Person)
J.Y.
J.Y.
2 years ago
May I ask why do you know that 210 is the 75% of the boys in group B In the end and that 90 is the 25% of boys in group a in the end? thanks
sstrike
Sstrike
2 years ago
Pair method // total unchanged concept
Did you notice the table there

1 pair
1u + 1p = 1200÷4=300

3u + 1p = 2×240=480

2u=480-300=180

1u = 180÷2=90

1p = 300-90=210
sstrike
Sstrike
2 years ago
It is similar as the question u posted earlier
https://ask.manytutors.com/questions/118613
⇨
pair concept