The percentage marks obtained by 100 students in an examination are given below: find median. Marks 30-35 35-40 40-45 45-50 50-55 55-60 60-65 frequency 14 16 28 23 18 8 3
Answers
median = l + (n/2 - cf /f) × h
= 40+ (110/2 - 30/28)×5
= 40+(55 - 30/28)×5
= 40+(25/28)×5
= 40+(0.89)×5
= 44.45
Answer:
Step-by-step explanation:
Given that,
Marks of Students Frequency Marks ui fiui
30-35 14 32.5 -3 -48
35-40 16 37.5 -2 -32
40-45 28 42.5 -1 -28
45-50 23 47.5 0 0
50-55 18 52.5 1 18
55-60 8 57.5 2 16
60-65 3 62.5 3 9
________________________________________________
Total 110
To find,
Median = ?
As we know,
Median = [(n + 1) ÷ 2]the value
= [(7 + 1) ÷ 2]
= 4th value
4th value = 47.5
= -65
Median = 47.5 - (65 * 5/110)
= 47.5 - 2.95
= 44.55
Learn more: Find the median
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