The average height of 13 girls in a class is 144(8/13)cm. The average height of 11 boys in a class is 169(5/11)cm. There are only 24 student in the class. What is the overall average height (in cm) of all the students together in the class?
Solution
Correct Answer: Option A
total height of girls = 13 x 144(8/13)
= 1880 cm
total height of boys = 11 x 69(5/11)
= 1864cm
Average height of all the students,
= (1880+1864)/24
= 156cm
= 1880 cm
total height of boys = 11 x 69(5/11)
= 1864cm
Average height of all the students,
= (1880+1864)/24
= 156cm
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