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The mean of three numbers is 15. If one of the numbers is 10, what is the mean of the other two numbers? (2020)

Practice Questions

1 question
Q1
The mean of three numbers is 15. If one of the numbers is 10, what is the mean of the other two numbers? (2020)
  1. 15
  2. 20
  3. 25
  4. 10

Questions & Step-by-step Solutions

1 item
Q
Q: The mean of three numbers is 15. If one of the numbers is 10, what is the mean of the other two numbers? (2020)
Solution: Let the other two numbers be a and b. Then, (10 + a + b) / 3 = 15. Solving gives (a + b) = 35, so Mean of a and b = 35 / 2 = 17.5.
Steps: 0

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