Question

Find the unknown entries in the following distribution table.​

Answer 1

✿ Answer:-

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To find A

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We know that the first digit of frequency is also the first digit of cumulative frequency so from this we can say that a = 12

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To find B

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We know that a + b = 25

12 + b = 25

b = 25 - 12

b = 13

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OR

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25 - a = b

25 - 12 = b

13 = b

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To find C

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25 + 10 = c

35 = c

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To find D

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we know that c + d = 43

35 + d = 43

d = 43 - 35

d = 8

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OR

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43 - c = d

43 - 35 = d

8 = d

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To find E

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48 - 43 = e

5 = e

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To find F

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48 + 2 = F

50 = F

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Verification:-

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We also know that the last digit of cumulative frequency is always equal to the sum of frequency

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= 12 + b + 10 + d + e + 2

= 12 + 13 + 10 + 8 + 5 + 2

= 50

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Our last digit of cumulative frequency is also 50 that's mean our ans / table is correct

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A = 12 , B = 13 , C = 35 , D = 8 , E = 5 and F = 50