Q.66- Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.A. 1044B. 2088C. 720D. 3240 Q.67- The average weight of three boys A, B and C is $$\begin{array}{c}\frac{163}{3}\end{array}$$ kg, while the average weight of three boys B, D and E is 53 kg. What is the average weight of A, B, C, D and E?A. 52.4 kgB. 53.2 kgC. 53.8 kgD. Data inadequate Q.68- Average of ten positive numbers is x. If each number is increased by 10%, then x :A. remains unchangedB. may decreaseC. may increaseD. is increased by 10% Q.69- 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 these two books?A. Rs. 5, Rs.7.50B. Rs. 8, Rs. 12C. Rs. 10, Rs. 16D. Rs. 12, Rs. 14 Q.70- 3 years ago the average of a family of 5 members was 17 years. A baby having been born, the average age of the family is the same today. The present age of the baby is:A. 1 yearsB.$$\frac{3}{2}$$ yearsC. 2 yearsD. 3 years Time is Up! Time's up