Question

the students in a seaside school are to have extra swimming lessons if they cannot swim. the table below gives information about the students in grades 7, 8 and 9.

Explanation:

Step1: Calculate total for each grade

For Grade 7: \(120 + 60=180\)
For Grade 8: \(168+11 = 179\)
For Grade 9: \(172 + 3=175\)

Step2: Calculate total for "Can swim"

\(120+168 + 172=460\)

Step3: Calculate total for "Cannot swim"

\(60+11+3 = 74\)

Step4: Calculate overall total

\(180+179+175=534\) or \(460 + 74=534\)

Answer:

	Can swim	Cannot swim	Total
Grade 8	168	11	179
Grade 9	172	3	175
Total	460	74	534