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
39 views
in Aptitude by (115k points)
closed by

In a group of friends travelling in a train, 8 friends can read French book, 18 can read Spanish book and 9 can read Russian book. In that group, none can read any other language book. If 2 friends in the group can read two languages book and one friend can read all the three languages book, then how many friends are there in the group ?


1. 28
2. 31
3. 30
4. 32

1 Answer

0 votes
by (113k points)
selected by
 
Best answer
Correct Answer - Option 2 : 31

Given:

8 friends can read French book, 18 can read Spanish book and 9 can read Russian book.

2 friends in the group can read two languages book and one friend can read all the three languages book

Calculation:

Let us assume the two friends who can read two languages book speak Spanish and French.

The third friends then read all the three languages book.

Number of friends who can read French book = 8.

Only read French book = 8 – 2 – 1

⇒ 5

Number of friends who can read Spanish book = 18.

Only read Spanish book = 18 – 2 – 1

⇒ 15

Number of friends who can read Russian book is 9.

Only read Russian book = 9 – 1

⇒  8

Thus the number of friends who can read only one language book

⇒ 5 + 15 + 8

⇒ 28

Number of Friends who can read two languages book = 2

Number of friends who can read all the languages = 1

Total number of friends

⇒ 28 + 2 + 1.

⇒ 31

∴ There are in the group 31 friends.

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

...