Average Practice Test 5

Question : 3 of 40

Marks: +1, -0

There are 6,000 books in a library. The average price of these books is Rs 150. If 170 new books are added, the average reduces to 145. Find the average price of the new books.

Rs 146.50
Rs 145.12
Rs 149.86
Rs 150
Rs 140

Validate

Solution:

Total price of books = Rs (6,000 × 150) = Rs 9,00,000
New total price = Rs (145 × 170) = Rs 24,650
∴ Required average

={ 9,00,000+ 24,650 }/{6,170 }

= Rs 149.86

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