A. 5 B.6 C. 7 D.8

]]>A. 20 B.21 C. 41 D.42

]]>n. Then the average of all seven numbers will be

A. n

B. n+1

C. kn+1/k, where k is a positive constant

D. n+2/7]]>

In 1996 it will be 42.666 after 4 years ie in 2000 it will be 42.666+4 = 46.666

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employeessum of age of all employeesAvg AgeRemark1990200(200*40) 1992(200-40) = 160(200*42)-(40*50) in 2 years avg age will increase by 21996(200-40+20) = 180(200*46)-(40*54)+(20*32) in next 4 years avg age will increase by 42000(200-40+20) = 180(200*50)-(40*58)+(20*36) = 8400(8440/180) = 46.7in next 4 years avg will increase by 4]]>

Sum : 4! (^{15}C_{5}) = 72072

Average : 72072/11 = 6552

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