The mean of x,x+11,x?11, and x?4 is 30. Find the value of the smallest number....
MATHEMATICS
SAT 2021
The mean of x,x+11,x?11, and x?4 is 30. Find the value of the smallest number.
- A. 31
- B. 42
- C. 40
- D. 20
Correct Answer: D. 20
Explanation
Recall how to find the mean: Mean/Average=Sum of all values/Number of values 30=(x)+(x+11)+(x?4)+(x?11)/4 4x?4=120 4x=124 x=31 Now, because the question asks you to find the smallest number, you need to find the value of x?11. x?11=31?11=20
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