1MA0 Higher November 2015 Paper 1 Q8

8 Milk is sold in \(\tfrac{1}{2}\) pint bottles, in 1 pint bottles and in 2 pint bottles.

One weekend a shop sold 100 bottles of milk.

 46 of the bottles were sold on Sunday.
 15 of the bottles sold on Sunday were 2 pint bottles.
 31 of the bottles sold on Saturday were \(\tfrac{1}{2}\) pint bottles.
 22 of the bottles sold were 2 pint bottles.
 30 of the bottles sold were 1 pint bottles.

How many 1 pint bottles were sold on Sunday? (4)