Answer:
1. 43
2. 18
3. 37
4. 18, 19
Explanation:
The stem and leaf plot is about splitting the digits. Here we split the tens from the units, so a 7 in the 1st row (stem 0) is 07 or 7 and the 4 in the 4th row (step 3) is a 34.
That means the highest score is 43.
Score 18 occurs twice. Otherwise, only 37 occurs more than 1 time, but it is there 3 times total, so not 2 times only.
The highest frequency score is the one that appears the most, so as we said in the last paragraph, 37.
Because we sort the digits in an ascending order, the 2 digits that could follow the 8 are 8 and 9. That means the answer to [4] is 18, 19.