B) 26
C) 40
D) 47
Let B be boys, and G be girls, then
B=G+7
And B+G=33
So, substituting, (G+7)+G=33, or 2G=33-7=26.
So, G=26/2= 13.
And B=33-13=20.
So, there were 13 girls, and 20 boys.
Related MCQs:
- In a school having roll strength 286, the ratio of boys and girls is 8:5. If 22 more girls get admitted into the school, the ratio of boys and girls becomes:
- In an examination 1100 boys and 900 girls appeared, 50% of the boys and 40% of the girls passed. The falling percentage is?
- Total number of students in a class is 95. if the total number of girls in the class is 45 then the ratio of the total number. If boys to total number girls is?
- There are 25 children in a class. The ratio of girls to boys is 2:3. What percentage of the class are girls?