Question

Urgent please!!! I really don’t understand it, tysm to anyone who can answer thissss :))))

Answer 1

Answer:

• (ax + by + cz)/(a + b + c)

Step-by-step explanation:

• Average = Sum / Number

In terms of the scores we calculate the sum as:

• ax + by + cz

The number is the sum of the frequencies:

• a + b + c

Mean average score is:

• (ax + by + cz)/(a + b + c)