a) A company has 200 employees working in its two branches. It pays an average salary of $5442 to its employees. If arithmetic means of the monthly salaries paid by the two branches are $4570 and $6750 respectively. Find the number of employees attached each branch. b) In a university of 100 men and 50 ladies the professor noted the number of days absent from class during the period of the four years of the course. For the men, the average number of absences was 15 with a standard deviation of 7, and for the ladies the average number of absences was 10 with a standard deviation of 6. What are the mean and the standard deviation of the absences for the entire class of students? 2.

a) A company has 200 employees working in its two branches. It pays an average salary of $5442 to its employees. If arithmetic means of the monthly salaries paid by the two branches are $4570 and $6750 respectively. Find the number of employees attached each branch. b) In a university of 100 men and 50 ladies the professor noted the number of days absent from class during the period of the four years of the course. For the men, the average number of absences was 15 with a standard deviation of 7, and for the ladies the average number of absences was 10 with a standard deviation of 6. What are the mean and the standard deviation of the absences for the entire class of students? 2.

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter2: Working With Real Numbers

Section2.3: Rules For Addition

Problem 7P

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