- A41
- B90
- C45
- D49
Step-by-Step Solution
Σf = 4 + 4 + 7 + 3 + 2 = 20. Σfx = 40 + 120 + 350 + 210 + 180 = 900. Mean = 900 ÷ 20 = 45.
Answer: C) 45
Find the mean of the following data: class marks 10, 30, 50, 70, 90 with corresponding frequencies 4, 4, 7, 3, 2.
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