Math, asked by rimjhim27ts, 1 year ago

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

Answered by akshitrs9
59

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

Answered by JackelineCasarez
0

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

\Sigma f_iu_i = -65

Median = 47.5 - (65 * 5/110)

= 47.5 - 2.95

= 44.55

Learn more: Find the median

brainly.in/question/5600442

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