A group of kids has 4 boys and 1 girl. The boys in the group can be represented in fraction as and the ratio of boys to girls is .
The fraction of boys in the group = Number of boysTotal number of kids=45 The ratio of the number of boys to the number of girls is 4:1.
a group consist of 4 girls and 7 boys in how many ways can a team of 5 members be selected if the team has 1) no girl 2)atlest one boy and one girl 3)at least 3 girls