Ask Singapore Homework?

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



Question

primary 6 | Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Xiaoshang Li
Xiaoshang Li

primary 6 chevron_right Maths

Maths olympiad question

Date Posted: 7 years ago
Views: 526

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
ValliRam
Valliram's answer
45 answers (Tutor Details)
1st
Clifton Ng Wei Zhi
Clifton Ng Wei Zhi
7 years ago
nCr should be n!/((n-r)!*r!) not n!/(n-r)!.

So 8C2 should be 8!/(6!*2!) = (8*7)/2 = 28, not 56.