Question

Please help me with number 4

Answer 1

The answer is 105 students.

Answer 2

50 students = 7 have red hair

100 students = 14 have red hair

150 students = 21 have red hair

200 students = 28 have red hair

250 students = 35 have red hair

300 students = 42 have red hair

↓                               ↓

600 students = 84 have red hair

650 students = 91 have red hair

700 students = 98 have red hair

750 students = 105 have red hair

Therefore, around 105 students would have red hair out of all the students in the school.