- A17.6
- B15.6
- C33.2
- D16.6
Step-by-Step Solution
fi*xi = 7*5+10*15+5*25+3*35 = 35+150+125+105 = 415. sum fi = 25. Mean = .
Answer: D) 16.6
The number of SMS messages sent per day by 25 teenagers is grouped as shown in the bar chart with class marks 5, 15, 25, 35 and frequencies 7, 10, 5, 3.
Find the mean number of messages per day.
Class 10Mean of Grouped DataStatistics and Probability
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