70% of students in a class are girls and 70% of the girls have chosen soccer as their favourite sport. If 98 girls have chosen soccer as their favourite sport, what is the total number of students in the class?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 200
Calculations:
70% of the girls who chose soccer = 98
Let the girls be x then
⇒ 70% of x = 98
⇒ x = 98 × 100/70
⇒ x = 140
70% of the students who are girls = 140
Total number of students = 140 × (100/70)
= 200