Answer:
12
Step-by-step explanation:
A: ,
A comma seperates two ideas to make it a compound sentence and can link two ideas together. A plus is for math, and a period is used to end a sentence
We have been given that a colleague has been tutoring six students in 11th grade to prepare for the ACT. Student scores were as follows: 20, 18, 16, 15, 23, 20. We are asked to find the mean of the ACT scores.
We will use mean formula to solve our given problem.




Upon rounding to nearest whole number, we will get:

Therefore, the mean of the ACT scores is 19 and option 'c' is the correct choice.