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There are five numbers in a series, 19, 22, 25, 26 and 28. When each o

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There are five numbers in a series, 19, 22, 25, 26 and 28. When each o [#permalink] New post   07 Oct 2024, 23:51
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There are five numbers in a series, 19, 22, 25, 26 and 28. When each of the numbers is increased by k the mean of the numbers becomes 28.5.What is the median of the new numbers?

A. 24.5
B. 26
C. 28.5
D. 29.5
E. 31.5


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Re: There are five numbers in a series, 19, 22, 25, 26 and 28. When each o [#permalink] New post   10 Oct 2024, 17:46
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The median of a set of numbers is the "middle" value in a sorted list. Therefore, the median of the existing series is 25.

The mean of the existing set is (19+22+25+26+28)/5 = 24.
Since we know that each of the numbers was increased by k, k must be 28.5-24 = 4.5

25+4.5 = 29.5
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Re: There are five numbers in a series, 19, 22, 25, 26 and 28. When each o [#permalink]
10 Oct 2024, 17:46
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