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creativ13 [48]
3 years ago
15

The mean of three number is 15. if 2 of the numbers are 18 and 16 what is the third number​

Mathematics
1 answer:
MrMuchimi3 years ago
3 0

Answer:

11

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count}

let the third number be x , then

\frac{18+16+x}{3} = 15 ( multiply both sides by 3 to clear the fraction )

34 + x = 45 ( subtract 34 from both sides )

x = 11 ← third number

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