An easy descriptive statistics question. Focuses on arithmetic mean (average) of two sets of numbers. The easier questions from this topic focus mainly on average.
The more difficult variants include other parameters such as range, median, mode, and standard deviation.
The video discusses 3 approaches to solve this question. The obvious and most intuitive text book approach and a couple of other ones.
Question
If the mean of numbers 28, x, 42, 78 and 104 is 62, what is the mean of 48, 62, 98, 124 and x?
A. 78
B. 58
C. 390
D. 310
E. 66
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