Not sure the exact point being made for 2 here, you still technically need to know the range so you still DO calculate. Calculation doesnt mean u need to know exact value but a range, sure. You actually must have quickly noticed or calculated that something under 300 time 10 will still give 3000<sum of india and china. So you have to conclude that in order to get to the answer. If the option were less than 0.01 then that would be the wrong answer.
JustKeepGoing
After going through all the solutions, I realised that nobody has mentioned a nuance in this question. Both the prompts of the questions can be answered without any calculations at all. How? Look below-For the 1st prompt, the median will be calculated for 10 terms. Since, the countries are already arranged in decreasing order. We will find out the 5th and 6th data point i.e., 910 & 750. Hence, median will be something between 910 & 750. No need to add and half. Check the drop down, only 830 makes sense. For the 2nd prompt, we know the Ethanol production of India+China. No need to calculate. Let it be xyz. Now, we are sure that the 11th country will have a value of ethanol production of something less than 300 (i.e. thailand). No need to calculate anything. Check the drop down for some hint. Eureka!. There is only one option with a "LESS THAN". Hence, LESS THAN 0.1