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4 votes
4 votes
5 positive integers are arranged in ascending order, as follows:

1,9, 9, 10, X
The mean and the median are equal.
Find X.

User Ryan Guest
by
2.9k points

1 Answer

12 votes
12 votes

Answer:

x = 16

Explanation:

Since the numbers are in ascending order, x is the number with the highest value here.

From the arrangement, we can see that the median (the middle number) is the third number which is 9

The mean is the sum of the numbers divided by their count. So we set up the mean and equate to the median

We have this as;

(1 + 9 + 9 + 10 + x)/5 = 9

29 + x = 5(9)

29 + x = 45

x = 45-29

x = 16

User Sneftel
by
3.1k points
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