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marshall27 [118]
3 years ago
9

The mean of 5 numbers is 12. If four of the numbers are 1, 2, 3, 20, what is the last number?

Mathematics
2 answers:
Sergeu [11.5K]3 years ago
8 0
The last number is 34 because. 1+2+3+20+34= 60 and 60 divided by 5 is 12
liubo4ka [24]3 years ago
7 0

<em>So</em><em> </em><em>the</em><em> </em><em>last</em><em> </em><em>number</em><em> </em><em>is</em><em> </em><em>3</em><em>4</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

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---------------------------------------------------------
---------------------------------------------------------

If we add up the equations straight down we will have 0a+2b = 6

Note how adding the 'a' terms gives us 3a + (-3a) = 3a-3a = 0a. The 0a term is really 0 since 0 times anything is 0. So the 'a' terms will go away

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