In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years 9 months then the number of girls in the school is
(a) 150 (b) 250 (c) 350 (d) 450
Question ID - 50919 | SaraNextGen Top Answer In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years 9 months then the number of girls in the school is
(a) 150 (b) 250 (c) 350 (d) 450
In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years 9 months then the number of girls in the school is
(a) 150 (b) 250 (c) 350 (d) 450
1 Answer
127 votes
Answer Key / Explanation : (a) -
Let the number of girls be 
Then, the number of boys = 
Then, 
127 votes
Answer Link
127