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For the frequency distribution below the mode is 36. Determine the missing frequency f. Class intervals: 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70 Frequencies: 8, 10, f, 16, 12, 6, 7

1. 8
2. 10
3. 12
4. 16

Correct answer: 10

Solution

Putting the modal-class values into the mode formula and setting the mode equal to 36 yields the missing frequency f = 10.

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