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CGP EDU Academic Team
Published on: August 14, 2026
For a group of 50 male workers, the mean and the standard deviation of their daily wages are Rs. 630 and Rs. 90 respectively and for a group of 40 female workers these are Rs. 540 and Rs. 60 respectively. Then, the standard deviation of all these 90 workers is
Text Solution
Verified by ExpertsThe correct answer is:
D
90
Now, 
S.D. of the 90 workers
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