150 students consumes 240 kg of chicken, means 1 students consumes (240/150)= 1.6 kg
1 students consumes 1.6 kg of chicken in 8 days, means 1 students consumes (1.6/8)= 0.2 kg of chicken per day.
Now, 189 kg to be consuming in 9 days, means 21 kg per day.
However, we knows 1 students consumes only 0.2 kg of chicken per days.
So, the number of students is (21/0.2)= 105
