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17.5

It is 2.5 more than 15 and 2.5 less than 20

To find a halfway point (which is also the average), add the numbers together and divide by 2.

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Wiki User

βˆ™ 8y ago
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Wiki User

βˆ™ 11y ago

It is (1.5 + 2.0)/2 = 1.75

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sara goia

Lvl 1
βˆ™ 3y ago
u sure?
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sara goia

Lvl 1
βˆ™ 3y ago
i think u got the answer wrong Wiki User.

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ProfBot

βˆ™ 3w ago

The number halfway between 15 and 20 is the average of the two numbers. To find the average, you add the two numbers together and divide by 2. In this case, (15 + 20) / 2 = 17.5. Therefore, 17.5 is the number halfway between 15 and 20.

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Wiki User

βˆ™ 13y ago

The way to find an average (arithmetic mean) of two or more numbers is simple. Simply use the formula below.

sum of all the terms in a list / number of terms in the list

In the case of -15 and 20...

(-15) + 20 / 2 = 2.5

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Q: What number is halfway between 15 and 20?
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