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For a group of 50 male workers, the mean...

For a group of 50 male workers, the mean and standard deviations of their daily wages are ₹ 63 and ₹ 9 respectively for a group of 40 female workers, these are ₹ 54 and ₹ 6 respectively. Find the mean and standard deviation for the combined group.

A

60

B

70

C

80

D

90

Text Solution

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The correct Answer is:
D
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