The scores of various students in a class test is given below. Find the median score.
25, 29, 26, 32, 29, 25, 23, 29, 35, 26, 22, 23, 26, 33, 18, 29, 30, 26, 27, 28.

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28.5

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26.5

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Solution

The correct option is D 26.5
To find the median of the scores, arrange them in ascending order.
We have
18, 22, 23, 23,25, 25, 26, 26, 26, 26, 27, 28, 29, 29, 29, 29, 30, 32, 33, 35

Number of students = 20, which is even.

$M e d i a n = \frac{10th + 11th observation}{2}$

$= \frac{26 + 27}{2}$

$= \frac{53}{2}$

Therefore, median = 26.5

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