Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
68 views
in Aptitude by (115k points)
closed by
In a class there are 50% girls. Ten girls joined and the number of girls increased by 10%. What is the number of students in the class at present?
1. 210
2. 160
3. 120
4. 250

1 Answer

0 votes
by (114k points)
selected by
 
Best answer
Correct Answer - Option 1 : 210

Given:

Percentage of girls in a class = 50%

After joining 10 girls number of girls increased by 10%

Calculation:

Let the number of students before joining the 10 girls be x.

According to the question,

Number of girls = x × 50%

⇒ 50x/100

⇒ 0.5x

After joining 10 girls, number of girls increased by 10% 

Number of girls = 0.5x × 110%

⇒  0.55x

⇒ 0.55x = 0.5x + 10

⇒ 0.05x = 10

⇒ x = 200

Now, total number of students = x + 10 =210

∴ The total number of students at present is 210.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...