Answer: A) 50% Explanation: CP of 1000gm = Rs. 10SP of 800gm = Rs. 12SP of 1000gm =12x1000/800 = Rs. 15 Now take 1000gm as reference to calculate profit.Profit=SP-CP=15-10=Rs. 5Profit % = 5x100/10 = 50%

Answer: B) fee paid for borrowing money Explanation: A credit card's interest rate is the price you pay for borrowing money. For credit cards, the interest rates are typically stated as a yearly rate. This is called the annual percentage rate (APR). On most cards, you can avoid paying interest on purchases if you pay your balance in full each month by the due date. Your APR is expressed in terms of a year, but credit card companies use it to calculate charges over your monthly statement period.

Answer: D) 81.5 Explanation: Let the number of students in classes A, B and C be P, Q and R respectively.Then, total score of A = 83P, total score of B = 76Q, total score of C = 85R.Also given that,(83P + 76Q) / (P + Q) = 79=>4P = 3Q.(76Q + 85R)/(Q + R) = 81=>4R = 5Q,=>Q = 4P/3 and R = 5P/3Therefore, average score of A, B, C = ( 83P + 76Q + 85R ) / (P + Q + R) = 978/12 = 81.5

The reciprocal of a negative number is always a negative number. So that the number and its reciprocal multiply to 1.    All real numbers except 0 have reciprocals.

Answer: B) Jairam Thakur Explanation: Jairam Thakur was sworn-in as the Chief Minister of Himachal Pradesh on 27th December 2017 after virbhadra Singh. The cabinet, including Thakur, were administered the oath of office and secrecy by Governor Acharya Dev Vrat at the historic Ridge Ground in Shimla, the capital city of Himachal Pradesh.   Jai Ram is the first chief minister from the second largest Mandi district and the 14th chief minister and sixth person to adorn the office of the chief minister.

Answer: C) Engine Explanation: Food is processed by the stomach to provide energy for the functioning of the body.Similarly, fuel is processed by the engine to provide energy for the functioning of automobile.

Answer: A) Saudi Arabia Explanation:

Answer: D) 16.38 Explanation: Given, Manideep purchases 30kg of barley at the rate of 11.50/kg nad 20kg at the rate of 14.25/kg. Total cost of the mixture of barley = (30 x 11.50) + (20 x 14.25) => Total cost of the mixture = Rs. 630 Total kgs of the mixture = 30 + 20 = 50kg Cost of mixture/kg = 630/50 = 12.6/kg To make 30% of profit => Selling price for manideep = 12.6 + 30% x 12.6 => Selling price for manideep = 12.6 + 3.78 = 16.38/kg.