The table shows the number of Primary 4 pupils in Justin School who participated in a History class.
- How many Primary 4 pupils did not participate in the training?
- What is the enrolment of Primary 4 pupils in Justin School?
(a)
Number of pupils who did not participate in each class:
Class 4A → 33 - 20 = 13
Class 4B → 29 - 20 = 9
Class 4C → 33 - 29 = 4
Class 4D → 35 - 31 = 4
Class 4E → 31 - 22 = 9
Total number of pupils who did not participate
= 13 + 9 + 4 + 4 + 9
= 39
(b)
Total enrolment
= 33 + 29 + 33 + 35 + 31
= 161
Answer(s): (a) 39; (b) 161