Mathematics, 21.06.2021 06:20, student0724

18. The combined mean and variance of 250 workers of city A and city B are 560 and 5497 respectively. The mean and the variances of the salary of 100 workers of city A are 650 and 17 respectively. Find the variance of the salary in city B.

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18. The combined mean and variance of 250 workers of city A and city B are 560 and 5497 respectively...

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18. The combined mean and variance of 250 workers of city A and city B are 560 and 5497 respectively. The mean and the variances of the salary of 100 workers of city A are 650 and 17 respectively. Find the variance of the salary in city B.​

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18. The combined mean and variance of 250 workers of city A and city B are 560 and 5497 respectively. The mean and the variances of the salary of 100 workers of city A are 650 and 17 respectively. Find the variance of the salary in city B.