2636: In a department of a university 100 students were admitted. Of the admitted students 90 per cent students appeared and passed in the final examination held two years later. Out of the passing students 1/ 5 passed in first division and 1/5 of the students who passed obtained a second division. In the final exam how many students passed in third division ?
(a) 18
(b) 36
(c) 64
(d) 54
2637: The greatest diversity of animal and plant species occurs in
(a) temperate deciduous forests
(b) tropical moist forests
(c) heavily polluted rivers
(d) deserts and savannas
2638: Consider the following statements:
India continues to be dependent on imports to meet the requirement of oilseeds in the country because:
1. Farmers prefer to grow food grains with highly remunerative support prices.
2. Most of the cultivation of oilseed crops continues to be dependent on rainfall.
3. Oils from the seeds of tree origin and rice bran have remained unexploited.
4. It is far cheaper to import oilseeds than to cultivate the oilseed crops.
Which of the statements given above are correct?
(a) 1 and 2
(b) 1, 2 and 3
(c) 3 and 4
(d) 1, 2, 3 and 4
2639: A lottery system has ticket numbers with eight digits. There are ten first prizes of Rs. 1.00 lakh each, one hundred second prizes of Rs. 10,000 each and one thousand third prizes of Rs. 1,000 each. At the draw of lots, an eight digit number is generated by choosing for each digit from left to right a random number in the range of 0 to Q. Any one who has a ticket with the first two digits (from left to right) matching, the chosen number gets a first prize, and so on. One individual purchases a large number of tickets at a discounted price of Re. 0.75 each. For how much money should he purchase tickets to achieve a 10% chance of winning a third prize ?
(a) Rs. 10,000
(b) Rs. 75,000
(c) Rs. 1,00,000
(d) Rs. 7,500
2640: Which one of the following fuels causes minimum environmental pollution ?
(a) Diesel
(b) Coal
(c) Hydrogen
(d) Kerosene