The average of x,x+5,x+6,x?7, and x?9 is 3. Find the sum of the largest and...
MATHEMATICS
SAT 2021
The average of x,x+5,x+6,x?7, and x?9 is 3. Find the sum of the largest and smallest numbers for this set of numbers.
- A. ?5
- B. 7
- C. 20
- D. 5
Correct Answer: D. 5
Explanation
Recall how to find the mean: Mean Or Average=Sum of all values/Number of values 3=x+(x+5)+(x+6)+(x?7)+(x?9)/5 5x?5=15 5x=20 x=4 The smallest number in this set is x?9, which is ?5. The largest number is x+6, which is 10. The sum of these two numbers is then given by the following: ?5+10=5
Post an Explanation Or Report an Error
If you see any wrong question or answer, please leave a comment below and we'll take a look. If you doubt why the selected answer is correct or need additional more details? Please drop a comment or Contact us directly. Your email address will not be published. Required fields are marked *