In a co-education class, 3/5 of the pupils are boys. If 1/2 of the girls are under 12 years of age and the remaing 8 girls are over 12, how many boys are there in the class? What is the total number of pupils in the class?
2007-09-23 02:42:23 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
If 3/5 of the students are boys, 2/5 must be girls.
Half of the girls means 1/5 and if the remaining girls are 8, obviously 8 represents 1/5th of the class. So, total class is 40.
3/5 of 40 is 24 and that represents the number of boys.
These problems try to test your verbal comprehension and whether you can convert the words into numbers.
2007-09-23 02:49:36 · answer #1 · answered by Swamy 7 · 1⤊ 0⤋
24 Boys
40 Number of pupils
2007-09-23 09:58:00 · answer #2 · answered by Raz 2 · 1⤊ 0⤋
16 girls+24 boys=40pupils
2007-09-23 09:50:51 · answer #3 · answered by calcstress 1 · 1⤊ 0⤋