Given:
The two ways table.
To find:
The number of girls in year 9.
Solution:
Using the two ways table, we get
Boys in year 10 = Total student in year 10 - Girls in year 10
= 256 - 123
= 133
Boys in year 9 = Total boys - Boys in year 10 - Boys in year 11
= 407 - 133 - 125
= 149
Girls in year 9 = Total students in year 9 - Boys in year 9
= 303 - 149
= 154
Therefore, the number of girls in year 9 is 154 and the correct option is C.
