Difference between revisions of "1997 PMWC Problems/Problem I7"
m |
(→Problem) |
||
Line 1: | Line 1: | ||
== Problem == | == Problem == | ||
− | 40% of girls and 50% of boys in a class got an 'A'. If there are only 12 students in the class who got 'A's and the ratio of boys and girls in the class is 4:5, how many students are there in the class? | + | <math>40\%</math> of girls and <math>50\%</math> of boys in a class got an <math>\mathrm{'A'}</math>. If there are only <math>12</math> students in the class who got <math>\mathrm{'A'}</math>s and the ratio of boys and girls in the class is <math>4:5</math>, how many students are there in the class? |
== Solution == | == Solution == |
Latest revision as of 14:23, 20 April 2014
Problem
of girls and of boys in a class got an . If there are only students in the class who got s and the ratio of boys and girls in the class is , how many students are there in the class?
Solution
Substituting, . So there are 12 boys, and students in the class.
See Also
1997 PMWC (Problems) | ||
Preceded by Problem I6 |
Followed by Problem I8 | |
I: 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 T: 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 |