Yxcas's answer to Damia's Primary 6 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Yxcas
Yxcas's answer
184 answers (A Helpful Person)
1st
From average you can find the total
15 x 4 = 60

Then you can minus off the other 3 scores from the total to find Peter’s score
60 - 10 - 0 - 15 = 35