Question

The shoe sizes of 30 people are recorded in the table below, but one of the

frequencies is missing.
Shoe size Frequency
11
3
4
5
A
7

Answer 1

Answer: A=12

Explanation:

Shoe Sizes: Frequency:
3 11
4 A
5 7

The frequency is how many people have the shoe sizes. For example, 11 people have shoe size 3, and 7 people have shoe size 5. Since 30 people's shoe sizes were recorded, 30 - (11+7) will be the answer.

30 will be from the 30 people whos shoe sizes were recorded. The 11 will be from the people with shoe size 3, and the 7 will be from the people with shoe size 5. So, 30 - 18 = 12.

12 people have shoe size 4.