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There are five numbers in a series, 19, 22, 25, 26 and 28. When each o
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07 Oct 2024, 23:51
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
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
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10 Oct 2024, 17:46
10 Oct 2024, 17:46
1
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
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
gmatclubot
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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