51 Views

Question : A container contains 25 litres of milk. From this container, 5 litres of milk is taken out and replaced by water. This process is further repeated two times. How much milk is there in the container now?

Option 1: 11.5 litres

Option 2: 14.8 litres

Option 3: 13.5 litres

Option 4: 12.8 litres


Team Careers360 24th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 12.8 litres


Solution : Left quantity = Initial quantity(1 – [Fraction removed]) N (Where N = Number of times the process is carried out)
Fraction of milk removed = $\frac{5}{25}$ = $\frac{1}{5}$
Now, the quantity of milk left in the container
$= 25(1 - \frac{1}{5})^3$
$= 25 × (\frac{4}{5})^3$
$= 25 × \frac{64}{125}$
$= 12.8$ litres
∴ There are 12.8 litres of milk left in the container.
Hence, the correct answer is 12.8 litres.

SSC CGL Complete Guide

Candidates can download this ebook to know all about SSC CGL.

Download EBook

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books