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The average height of 30 girls out of a class of 40 is 160 cm and that of remaining girls is 156 cm. The average height of whole class is:

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Important Questions on Average

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BSF GD Constable
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SSC Constable (GD) CAPFs, NIA, SSF & Rifleman (Assam Rifles) Recruitment Exam - Elementary Mathematics>Chapter 7 - Average>MULTIPLE CHOICE QUESTIONS>Q 19
The average of n numbers is x. If 36 is subtracted from any two numbers each, then new average is (x-8). The value of n is:
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SSC Constable (GD) CAPFs, NIA, SSF & Rifleman (Assam Rifles) Recruitment Exam - Elementary Mathematics>Chapter 7 - Average>MULTIPLE CHOICE QUESTIONS>Q 20
The average salary of male employee in a firm is 520 and that of female employees is 420. The mean salary of all the employees is 500. The percentage of female employees is: