Let the total sum of the scores of the first class of 35 students be
a. The mean is 74.3
.
So
Also, let the total sum of the scores of the second class of 28 students be
b. The mean is 67.6 .
so
The combined group has 35+28=63 students. The sum of their scores is
a+b=2600.5+1892.8=4493.3
Thus, the mean of the combined group is
I don't know the answer but you have to add 333.34 3 times or multiply it 3 times. I don't know the 2nd question.
Answer:
1/4×1/6
Step-by-step explanation:
All you do is multiply by the reciprocal. (The 6 goes from 6/1 to 1/6 because you flip it around) Also 1/4×1/6= 1/24