Question

Find the frequency f1 if the mode is 65

Answer 1

Step-by-step explanation:

Mode = l + (f1-f0/2f1-f0-f2) * h

65=60 + (12-f1/2(12) - f1-6) *20

65-60 = (12-f1/24-f1-6) *20

5 = (12-f1/18-f1) *20

1 = (12-f1/18-f1) *4

1 = 4(12-f1)/18-f1

18- f1 = 48 - 4f1

-f1 + 4f1 = 48-18

3f1 = 30

f1 = 10

Answer 2

Answer:

Class frequency

0-20 6

20-40 8

40-60 f1

60-80 12

80-100 6

100-120 5

Where frequency 6,8, f1, and 12 are in ascending order.

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