# Math Help - Calculating mean

1. ## Calculating mean

12 boys and 8 girls take a test
The mean mark of these 20 students is 7.

Calculate the total of the marks of the 20 students.

Please help me with this! Am I right in saying the formula for calculating mean is:

Frequency * marks / total frequency = mean

How do go from here?

2. Originally Posted by yorkey
12 boys and 8 girls take a test
The mean mark of these 20 students is 7.

Calculate the total of the marks of the 20 students.

Please help me with this! Am I right in saying the formula for calculating mean is:

Frequency * marks / total frequency = mean

How do go from here?
(Total marks)/20 = 7 ....