a group of three numbers has an average of 70 in the first two are 12 and 19 what is the third number

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a group of three numbers has an average of 70 in the first two are 12 and 19 what is the third number

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WaywardDelaney WaywardDelaney · Answer 1 · 2025-03-23T14:33:10-04:00

Answer:

The third number is 179 .

Step-by-step explanation:

Given as :

The average of group of three numbers = n = 70

The first number = x = 12

The second number = y = 19

Let The third number = z

Now, According to question

∵ The average of group of three numbers = n

I.e n = [tex]\dfrac{x + y + z}{3}[/tex]

or. [tex]\dfrac{x + y + z}{3}[/tex] = 70

Or, x + y + z =70 × 3

Or, x + y + z = 210

Or, 12 + 19 + z = 210

Or, 31 + z = 210

or, z = 210 - 31

∴ z = 179

So, The third number = z = 179

Hence , The third number is 179 . Answer

a group of three numbers has an average of 70 in the first two are 12 and 19 what is the third number ​

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a group of three numbers has an average of 70 in the first two are 12 and 19 what is the third number