In terms of j, what is the average of j,3j+1,j?5, and 3j+4?
MATHEMATICS
SAT 2021
In terms of j, what is the average of j,3j+1,j?5, and 3j+4?
- A. j+8
- B. j+3
- C. 2j?2
- D. 2j
Correct Answer: D. 2j
Explanation
Recall how to find the mean: Mean/Average=Sum of all valuesNumber of values Average=j+(3j+1)+(j?5)+(3j+4)/ 4=8j/4=2j
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