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Marks of 60 students: less than 20 – 8, less than 40 – 20, less than 60 – 42, less than 80 – 54, less than 100 – 60. Find the median mark.

Competition practiceStatistics

A49 1/11
B50
C45 5/11
D49 1/2

Step-by-Step Solution

N /2 = 30

: median class 40–60 with

c f = 20, f = 42 - 20 = 22

. Median

= 40 + \frac{30 - 20}{22} \times 20 = 49 \frac{1}{11}

.

Answer: A) 49 1/11

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