- A52
- B57
- C104
- D47
Step-by-Step Solution
f1 + f2 = 120 - (17+32+19) = 120 - 68 = 52. (This follows directly from the total frequency, independent of the mean.)
Answer: A) 52
The mean of the distribution below is 50. Find the missing frequencies f1 and f2, given the total frequency is 120.
Classes 0-20,20-40,40-60,60-80,80-100 with frequencies 17, f1, 32, f2, 19.
What is f1 + f2?
Class 10Mean of Grouped DataStatistics and Probability
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