The mean of a group X is 70 and the mean of group Y is 85. If the number of observations in group Y is five times that of group X, then the combined…
CA Foundation · Quantitative Aptitude · MTP · January 2026
The mean of a group X is 70 and the mean of group Y is 85. If the number of observations in group Y is five times that of group X, then the combined mean of both the groups is
Suggested Answer and Working Notes:
Correct Answer: Option (D)
D. 82.5
Topics: Part-C: Statistics
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