Question

The table below shows the number of students in a class who play on a school team and/or are members of a school club: Play on a School Team Do Not Play on a School Team Total Club Member 12 ? 15 Not a Club Member 11 10 21 Total 23 13 36 What is the missing number in the table?

Answer 1

3

Explanation:

12+x = 15

Subtracting 12 from each side, we have:

12+x-12 = 15-12

x = 3

Answer 2

The correct answer is:

3.

Explanation:

The amounts for Club Member are added together for a total of 15. We have 12 added to the unknown number for this:

12+x = 15

Subtracting 12 from each side, we have:
12+x-12 = 15-12
x = 3