27/7 . There are 1200 students at a school,
Kate is helping to organise a party.
She is going to order a pizza.
Kate takes a sample of 60 of the students at the school.
She asks each student to tell her one type of pizza they want.
The table shows information about her results.
Pizza
Number of students
20
ham
15
salami
vegetarian
8.
margherita
17
Work out how much ham pizza Kate should order.
Write down any assumption you make and explain how this could affect your answer ​