The table shows the number of pupils who wear spectacles in three Primary 6 classes in a school.
- How many pupils in the three classes wear spectacles?
- The total number of pupils who wear spectacles is the same as the total number of pupils in Class 6B. How many pupils in Class 6C wear spectacles?
(a)
Total number of pupils not wearing spectacles
= 12 + 22 + 20
= 54
(b)
Total number of pupils in Class 6B
= 9 + 22
= 31
Number of pupils wearing spectacles in Class 6C
= 31 - (10 + 9)
= 31 - 19
= 12
Answer(s): (a) 54; (b) 12