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
50 views
in Aptitude by (114k points)
closed by

The average mark of a student in 5 subjects is 70. Later, the mark in one subject was increased by 19.5, and the mark in another subject was decreased by 8.5. Find the correct average of marks.


1. 72
2. 72.2
3. 76
4. 73.5

1 Answer

0 votes
by (113k points)
selected by
 
Best answer
Correct Answer - Option 2 : 72.2

Given:

The average marks of student in 5 subjects are 70.

Formula used:

Sum of observations = average × numbers of observations

Calculation:

Sum of all numbers = 70 × 5 = 350

Later, marks in one subject were increased by 19.5 and marks in another subject were decreased by 8.5.

∴ Correct marks = 350 + 19.5 – 8.5 = 361

Correct Average = Correct sum / number = 361 / 5 = 72.2

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

...