The average age if all the girls in the class of 42 students is 13 years . The average age of all the boys as well as the average age of 23 of the boys of the same class is 16 years .Which of the following could be tge average age of the students in the class (in years)
Answer (1)
8th Dec, 2019
Average age of 23 boys = 16 years
Sum of age of all boys = 23x16 = 368
Number of students = 42
Number of girls = 42-23 = 19
Average age of 19 girls = 13
Sum of age of all girls = 247
Total sum of ages = 368+247 = 615
Average = 615/42 = 14.64 years
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