Class A has 19 pupils and class B has 25 pupils. Both classes sit the same maths test.
The mean score for class A is 80.
The mean score for class B is 68.
What is the mean score (rounded to 2 DP) in the maths test across both classes?

22 and 22

step-by-step explanation:

10 plus 12 equals 22.

12 plus 10 also equals 22 because regardless of what order they're in, they're gonna equal the same thing.

i will pick c put check it over to be sure

step-by-step explanation:

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3