# Sarin participates in school anniversary event part 27 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills to deal with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Ratio and Problem Solving.

Read the posting on Sarin participates in school anniversary event part 1 for story on school anniversary.

Read posting on Sarin learns Average Number, Percentage and and Charting in school (Math Concept) to understand the concept of Average Number.

Challenge yourself with the question before look out for the given solution‼

Upper primary school mathematics question UPQ550

The graph shows the number of pupils participating in the school anniversary event by 5 P6 classes. The average number of pupils the 5 classes was 80. How many pupils from Class 6E participate in the school anniversary event?

Solution:

Total number of Pupils participated in the event = 80 × 5 = 400

From the chart,

Number of pupils in Class 5A = 90

Number of pupils in Class 5B = 86

Number of pupils in Class 5C = 80

Number of pupils in Class 5D = 74

Totla number of pupils from the above four classes

= 90 + 86 + 80 + 74 = 330

The number of pupils from Class 5E = 400 – 330 = 70