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The mean of a set of four numbers is 3.5. if a fifth number, x, is added to the data set the mean becomes 4. what is the value of x.

The mean of a set of four numbers is 3.5. if a fifth number, x, is added to the data set the mean becomes 4. what is the value of x.
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The mean of a set of four numbers is 3.5. if a fifth number, x, is added to the data set the mean becomes 4. what is the value of x.

User Tenclea
by
8.5k points

1 Answer

1 vote
The total = 3.5 * 4 = 14
(14 + x) / 5 = 4
14 + x = 20
x = 6


User Matthew Daly
by
8.2k points
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