Multiple choice

The average price of 10 books is Rs. 12 while the average price of 8 of these books is Rs. 11.75 of the remaining two books, if the price of one book is 60% more than the price of the other, what is the price of each of there two books?

  1. Rs. 5, Rs. 7.50

  2. Rs. 8, Rs. 12

  3. Rs. 10, Rs. 16

  4. Rs. 12, Rs. 14
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total of 10 books = 10 × 12 = Rs. 120. Sum of 8 books = 8 × 11.75 = Rs. 94. So remaining 2 books sum to Rs. 26. Let cheaper be x, then 1.6x + x = 26 → 2.6x = 26 → x = 10, other = 16. Checking: Rs. 10 + Rs. 16 = Rs. 26 ✓ and 16 is 60% more than 10 (1.6 × 10 = 16) ✓

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