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Question
Find the median of 18, 19, 20, 23, 22, 20, 17, 19, 25 and 21
Solution
18, 19, 20, 23, 22, 20, 17, 19, 25 and 21
Arranging in ascending order: 17, 18, 19, 19, 20, 20, 21, 22, 23, 25
Here, numbers of terms = 10 which is even.
∴ Median =`{"n"/2"th term"+("n"/2+1)"th term"}`
`= 1/2{10/2"th term"+(10/2+1)"th term"}`
= `1/2` {5th term + 6th term}
= `1/2` {20 + 20}
= `1/2xx40` = 20
Hence, median = 20
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