Out Of 1200 Pupils In A School, 900 Are Boys And The Rest Are Girls. If 20% Of The Boys And 30% Of The Girls Wear Spectacles, Find How Many Pupils In All Wear Spectacles And What Percent Of Total Number Of Pupil Wear Spectacles

Given: No. of people in school = 1200

No. of boys in school = 900

20% of boys and 30% of girls wear spectacles To find: How many people in all wear spectacle and what percentage of people wear spectacles

Solution:

Number of girls in a school = 1200 - 900 =300

If that boys = 20% who wear spectacles .

If the girls = 30% who wear spectacles .

Total number of pupils wear who spectacles.

Boys = $\frac{20}{100} \times 1200 =20 \times12$ =180

Girls = $\frac{30}{100} \times 300 =30 \times 3$

=90

Total number of pupils who wear spectacles = 180 + 90 =270

Percent of pupils who wear spectacles

= $\frac{270}{1200} \times100 $

=$\frac{270}{12}$

=22.5%

Related Articles Why do we wear Spectacles?
If the ratio of boys to girls is 12 : 5, and the total number of girls is 840. How many boys are there?
The ratio of boys and girls in a school is 12 : 5. If the total number of girls is 840. Find the total strength of the school.
In a school $\frac{4}{11}$ of the students are girls. If there are 490 boys. Find the number of girls.
In school there are 1200 students. If the percentage of boys in a school is \( 60 \% \), then find the of girls.
There are 20 girls and 15 boys in a class.(a) What is the ratio of number of girls to the number of boys?(b) What is the ratio of number of girls to the total number of students in the class?
In a college, out of 4320 students, 2300 are girls. Find the ratio of(a) Number of girls to the total number of students.(b) Number of boys to the number of girls.(c) Number of boys to the total number of students.
The ratio of girls to the boys in a school is 4 : 5. If the number of girls is 1500, find the number of boys in that school. Also, find the total number of children in that school.
In a class of 30 students, the number of girls is one-fifth of the number of boys. How many boys are there in the class?
The ratio of boys to girls in the sixth grade is $2:3$. If there are 24 boys, how many girls are there?
The number of boys and girls in a class are in the ratio 7:5. The number of boys is 8 more than the number of girls. Whar is the total class strength?
The number of boys and girls in the class are in the ratio of 7:5. The number of boys is 8 more than the number of girls. Find the number of students in the class.
What is the total number of students in a class with 28 boys and \( x \) girls?
In a class of 52 students, the number of boys is $\frac{ 6}{7}$ of the number of girls find out the number of boys.
There are $70$ student in class boys, girls ratio $4: 3$, how many are boy and girls?
Kickstart Your Career
Get certified by completing the course

Get Started