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Subject Mathematics
251. The ratio of the number of red balls, to yellow balls, to green balls in an urn 2:3:4. What is the probability that a ball chosen at random from the urn is a red ball?
252. What is the probability that the product of two integers (not necessarily different integers) randomly selected from the numbers 1 though 20, inclusive, is odd?
253. Point A is 10 miles West of Point B. Point B is 30 miles North to Point C. Point C is 20 miles East of Point D. What is the distance between points A and D?
254. The length of a rectangle is increased by 25%. By what percentage should the width be decreased so that the area of the rectangle remains unchanged?
255. A closed rectangular tank contains a certain amount of water. When the than is placed on its 3 ft by 4 ft side, the height of the water in the tank is 5 ft. When the tank is placed on another side of dimensions 4 ft by 5 ft, what is the height, in feet, of the surface of the above the ground?
258. In a country, 60% of the male citizen and 70% of the female citizen are eligible to vote, 70% of male citizens eligible to voted, and 60 % of female citizens eligible to vote voted. What fraction of the citizens voted during the election?
260. একটি আয়তাকার কক্ষের ক্ষেত্রফল ১৯২ বর্গমিটার। এর দৈর্ঘ্য ৪ মিটার কমালে এবং প্রস্থ ৪ মিটার বাড়ালে ক্ষেত্রফল অপরিবর্তিত থাকে। আয়তকার কক্ষের সমান পরিসীমাবিশিষ্ট বর্গাকার কক্ষের ক্ষেত্রফল কত হবে?
275. A candy factory makes 9 flavors of candy. The factory puts 8 pieces of each flavor in each bag of candy. How may pieces of candy does the factory put in 6 bag?