What is the average number of Samsung cellular phones sold by stores B,C and D

What is the central angle corresponding to number of cellular phones (both Nokia and Samsung) sold by store D

Number of cellular phones (both Nokia and Samsung) sold by store B is what percent more than the number of Nokia cellular phones sold by store A

A, B and C started a business by investing INR 20000/-, INR 28000/- and INR 36000/- respectively. After 6 months, A and B withdrew an amount of INR 8000/- each and C invested an additional amount of INR 8000/-. All of them invested for equal period of time. If at the end of the year, C got INR 12550/- as his share of profit, what was the total profit earned

A vessel contains a mixture of milk and water in the respective ratio of 14:3.25.5 litre of the mixture is taken out from the vessel and 2.5 litre of pure water and 5 litre of pure milk is added to the mixture. If the resultant mixture contains 20% water, what was the initial quantity of mixture in the vessel before the replacement ? (in litre)

8 5.5 8.5 23 89.5 ?