The table shows the number of students who wear spectacles in three Primary 4 classes in a school.
- How many students in the three classes do not wear spectacles?
- The total number of students who wear spectacles is the same as the total number of students in Class 4A. How many students in Class 4B wear spectacles?
(a)
Total number of students not wearing spectacles
= 21 + 20 + 13
= 54
(b)
Total number of students in Class 4A
= 21 + 9
= 30
Number of students wearing spectacles in Class 4B
= 30 - (9 + 11)
= 30 - 20
= 10
Answer(s): (a) 54; (b) 10