Banking Quantitative Aptitude Sample Paper Quantitative Aptitude Sample Paper-38

Pradeep invested 20% more than Mohit. Mohit invested 10% less than Raghu. If the total sum of their investment is Rs. 17880, then how much amount did Raghu invest?                         [Corporation Bank (PO) 2011]

A) Rs. 6000

B) Rs. 8000

C) Rs. 7000

D) Rs. 5000

E) None of these

Correct Answer: A

Solution :

Let the amount Raghu invested be Rs. x.

Then, amount invested by Mohit \[=x\times \frac{90}{100}=\frac{9x}{10}\]

Now, amount invested by Pradeep

\[=\frac{9x}{10}\times \frac{120}{100}=\frac{108x}{100}=\frac{27x}{25}\]

\[\therefore \] \[x+\frac{9x}{10}+\frac{27x}{25}=\text{Rs}\text{. 17880}\]

\[\Rightarrow \]\[\frac{100x+90x+108x}{100}=17880\]

\[\Rightarrow \] \[298x=17880\times 100\]

\[\Rightarrow \] \[x=\frac{17880\times 100}{298}\]

\[\therefore \] \[x=60\times 100=\text{Rs}\text{. 6000}\]