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प्रश्न
Ten students collected the following amounts (in rupees) for an orphanage:
250, 450, 500, 750, 300, 650, 200, 350, 500, 650
Find their mean and median.
बेरीज
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उत्तर
Sum of observations = 250 + 450 + 500 + 750 + 300 + 650 + 200 + 350 + 500 + 650 = 4600
Total number of observations = 10
Mean = `"Sum of observations"/"Total number of observations"`
= `4600/10`
= 460
Arranging the numbers in ascending order,
200, 250, 300, 350, 450, 500, 500, 650, 650, 750
n = 10 observations
`(n/2) = 10/2` = 5th
`(n/2 + 1) = (10/2 + 1)` = 6th
Median = `(450 + 500)/2`
= `950/2`
= 475
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