তিনটি সংখ্যার গড় হচ্ছে ৬ এবং চারটি সংখ্যার ( পূর্বের তিনটিসহ) গড় হচ্ছে ৮ । চতুর্থ সংখ্যাটির অর্ধেক কত.হবে?
A. 7
B. 8
C. 6
D. 12
সঠিক উত্তরঃ
A.
7
Explanation:
Related Questions (Any University/Year)
- 10 টাকা × 15 টাকা ÷ টাকা × 30 টাকা = কত?
- A nut mixture consists of peanuts, pistachios, and macadamia nuts in the ratio 5:3:2, respectively, by weight. What amount of pistachios will be in 40 pounds of the mixture?
- একটি ঘড়ি ১৫০ টাকায় বিক্রয় করলে ২৫% ক্ষতি হয় । ঘড়িটির ক্রয় মূল্য কত ?
- Three workers can do a job in 12 days. Two of the workers work twice as fast as the third. How long would it take one of the faster workers to do the job alone?
- Three friends - Anwar, Bobby and Dipu divided Tk. 1105 amongst them in such a way that if Tk. 10, Tk. 20 and Tk. 15 were removed from the amount that Anwar, Bobby and Dipu received respectively, then the share of the amount they got would be in the ratio of 11 : 18 : 24. How much did Dipu receive?
- If x is positive integer and y > -2 , which of the following must be positive ?
- What was the original price of an item if a discount of 20% reduced the price to Tk. 100?
- Oeshi has taken five math tests so far this semester. If she gets a 60 on his next test, that grade will lower her test average by 4 points. What is her average now?
- If a boy takes as much time in running 10 min, a car takes in covering 25m, the distance covered by the boy's during the time the car covers 1 km is -
- চিনির দাম ২০% কমল, কিন্ত চিনির ব্যবহার ২০% বৃদ্ধি পেল। এতে চিনি বাবদ ব্যয় শতকরা কত বাড়ল বা কমল?
- A number when divided by a divisor leaves a remainder of 24. When twice the original number is divided by the same divisor the remainder is 11. What is the value of the divisor?
- In a store, the ratio of red socks to green socks is 3:2. The socks are made of either cotton or wool. If 60% of the red socks are made of cotton and 80% of the green aocks are made of wool, what percentages of socks are made of cotton?
- Which of the following fractions is the smallest ?
- Ms Zareen purchased stock for TK. 15,000 and I sold 2/3 of it after its value doubled. She sold the remaining stock at 5 times higher then its purchase price. What was her total profit?
- The closest approximation to the value of sqrt(4/5)" " is
- একটি গাড়ির সামনের ও পেছনের চাকার পরিধি যথাক্রমে ৩ ও ৪ মিটার। গাড়িটি কত কিলোমিটার পথ অতিক্রম করলে সামনের চাকা পেছনের চাকার চেয়ে ১০০ বার বেশি ঘুরবে?
- 40% of students in a class are smart. The rest are stupid. Half the students play sports and half don't. If 20% of the students are smart and play sports, what percent of the students are stupid and don't play sports?
- One copy machine can make 20 copies a minute , and a second copy machine makes 15 copies a minute. If the two copiers work together, how long would it take them to make 2100 copies?
- Rachel, David, and Kristen decide to pool their money to buy à video game system. David contributes 4 dollars more than twice what Kristen does, and Kristen contributes 3 dollars less than Rachel does, If Rachel contributes r dollars, then, in terms of r, how much does David contribute?
- খুলনা বিশ্ববিদ্যালয় হতে রূপসা ব্রীজ পর্যন্ত সরল পথে ৪০ মিটার ব্যবধানে লাইট পোষ্ট স্থাপন করা আছে। প্রথম থেকে নবম পোষ্ট পর্যন্ত প্রতি মিটার ৩০০০ টাকা ব্যয়ে ড্রেন নির্মাণ করতে গেলে কত টাকা লাগবে?