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deva

· started a discussion

· 1 Months ago

REMAING (Question:126983.0)

WHY U TAKE 85%

Question:

Mr. Giridhar spends 50% of his monthly income on household items and out of the remaining he spends 50% on transport, 25% on entertainment, 10% on sports and remaining amount of Rs.900 is saved. What is Mr. Giridhar’s monthly income ?

Options:
A)

Rs.6,000 

B)

Rs.12,000

C)

Rs.9,000

D)

Cannot be determined 

E)

None of these

Solution:

Let his monthly income be Rs. x

Money spent on house holds =  x2   

Money spent out of the remaining amount = 85% of  x2   

Savings ⇒ 15% of  x2    = 900

⇒ x =  900×2×10015   

⇒ x = Rs.12000

Knowledge Expert

· commented

· 1 Months ago

Dear student
Here is an alternate solution for the given question-
Let Giridhar’s monthly income be Rs.100
Then, money spent on household’s item
=100×50/100 = Rs. 50
Remaining amount = 100 - 50 = Rs. 50
Money spent on transport
=50×50/100 = Rs. 25
Money spent on entertainment
=50×25/100 = Rs. 12.5
Money spent on sports
=50×10/100 = Rs. 5
∴ Last remaining amount
= 100 - (50 + 25 + 12.5 + 5)
100 - (92.5) = Rs. 7.5
∴ Rs. 7.5 is saved, when total income is Rs. 100
∴ Rs. 1 is saved, when total income =100/7.5
Now, Rs. 900 is saved, when total income
=100/7.5×900
= 100 × 120
= Rs. 12000

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