The formula of that is 24
Rd st is xy yz (c) look at order. Rs is the first two and xy is the first two. Same for the second but last two.
Answer:
the correct answer is b
Step-by-step explanation: i just did the same question
Answer:
77.2%
Step-by-step explanation:
The average formula is:

Let's first find the sum of all the numbers (remember sum means to add):
(2)(85) + (4)(78) + (3)(66) + 92 = ?
170 + 312 + 198 + 92 = 772
There are marks for 10 students so that is what goes at the bottom (10 students, 10 test scores)
Plug both things into the equation:

Therefore, the average mark on the test was 77.2%
<em>Hope this helps!!</em>
<em>- Kay :)</em>