A colony of 15,000 ants increased by 50% after being fed. Then after 4 weeks without food, the number of ants dropped by 60%. What percentage decline did the original population undergo?
A. 72.5
B. 75
C. 90
D. 95.5
E. none of these
সঠিক উত্তরঃ
C.
90
Explanation:
Related Questions (Any University/Year)
- একটি লোকের কিচু মুরগি এবং গরু আচে। যদি তাদের মাথার সংখ্যা 48 এবং পায়ের সংখ্যা 140 হয়, তাহলে মুরগির সংখ্যা কত?
- ১১ জন কুমোর ৪ দিনে ১৪৩টি হাড়ি তৈরি করতে পারে। ৪ দিনে ১৬৯টি হাড়ি তৈরি করতে কত জন কুমোরের প্রয়োজন?
- A shipping clerk has five boxes of different but unknown weights each weighting less than 100 kg. The clerk weights the boxes in pairs. The weights obtained are 110, 112, 113, 114, 115, 116, 117, 118, 120 and 121 kg. What is the weight of the heaviest box?
- The difference between a number and its three-fifth is 50. what is the number?
- Diana bought a stereo for $530, which was the retail price plus a 6 percent sales tax. How much money could she have saved if she had bought the stereo at the same retail price in a neighboring state where she would have paid a sales tax of 5 percent?
- You are given the equation sqrt( 3x)+3=4, which one of the following is the correct value of x?
- Total production cost is measure by the following mle:Total production cost = Material cost + Labor Cost + Overhead CostIn a celain production period, material cost was Tk. 20 and was Y‹ ths of labor cost. Overhead cost was Tk. 10 more than labor cost. What was the total production cost in Taka?
- Which of the following fractions is the smallest ?
- The potato traders have increased the original price of potatoes by 20% by creating a false shortage of supply. Govt. intervened into the scene and forced the traders to reduce their price by 20% of new price and stick to that. Currently the traders are selling potatoes with a loss/gain of what percentage over the original price?
- Present age of mother is 4 times the sum of the ages of her two daughters, After 5 years, mothers ages will be twice the sum of the ages of the two daughters, What is the present age of the mother?
- A 112 meter rope is cut into three pieces with each piece twice as long as the previous one. How long is the longest piece?
- নিচে চারটি বাক্সের দৈর্ঘ্য, প্রস্থ ও উচ্চতা দেয়া আছে। কোন বাক্সটি সবচেয়ে বড়?
- A car going 40 miles per hour set up on an 80 miles trip at 9.00 A.M. Exactly 10 minutes latter, a second car left from the same place and followed the same route, How far in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?
- Lamisa's age is 5 years more than twice Gallb's age. Zihan's age is 13 years less than 10 times Galib's age. If Zihan is 3 times as old as Lamisa, how old is Lamisa?
- একটি ঘড়ি ১৫০ টাকায় বিক্রয় করলে ২৫% ক্ষতি হয় । ঘড়িটির ক্রয় মূল্য কত ?
- Anwar is 3 times as old as Babu. In 13 years, Anwar will be 1 year younger than twice Babu's age. How old is Anwar now?
- There are 50 students enrolled in Business studies .Of the enrolled students 90% took the final exam. Two-thirds of the students who took the final exam passed the final exam. How many students passed the final exam ?
- শতকরা বার্ষিক কতটাকা সুদে ৫০০০ টাকার ৪ বছরের সুদ ২০০০ টাকা হবে?
- If the production is increased to 120 pieces per hour, the profit is:
- In a coffee mixture, the ratio of coffee. milk, sugar and cream are mixed by the weight in the ratio of 5:3: 2: 2 respectively. How many kg of coffee are there in 18 kgs of the mixture?
- চিনির দাম ২০% কমল, কিন্ত চিনির ব্যবহার ২০% বৃদ্ধি পেল। এতে চিনি বাবদ ব্যয় শতকরা কত বাড়ল বা কমল?
- Rabib has x more marbles than Rafi has. Together they have y marbles.Which of the following represents the number of marbles that Rafi has?
- How many flowers are there if all of them are roses except two, all of them are tulips except two and all of them are daisies except two?
- If a, b and c are positive even integers such that a
- টেলিফোনের মোট কল সংখ্যা হল 'n' এবং প্রত্যেক কলের চার্জ হল 'p'। মোট কল চার্জ কত হবে?
- In a sports club with 30 members, 17 play badminton and 19 play tennis and 2 do not play either. How many members play both badminton and tennis?
- Two nations produce 1/5 and 3/10 respectively, of the world production of aluminum. What fraction of world production do the other nations produce together?
- In a pickup van, in addition to 50 hens, there are 45 goats and 8 camels with some keepers. If the total number of their feet be 224 more than the number of their heads in the van, find out the number of keepers in the van.
- রাবেয়া একটি বালিকা শ্রেনির যে কোনো প্রান্ত থেকে একাদশ অবস্থানে আছে। শ্রেনিতে মোট বালিকার সংখ্যা কত?
- If 4 is subtracted from one-fourth of a number, the result is 20. Which of the following is the number?
- Seven kg of mangoes cost as much as 10 kg of apples and 1 kg of oranges. 7 kg at oranges cost as much as 1 kg of mangoes and 2 kg of apples. How many kg of apples can be purchased by the amount of money required to purchase 12 kg of mangoes?
- The ratio of Pens and Pencils in a shop is 3 : 2 respectively . The average number of Pens and Pencils is 180. What is the number of Pencils in the shop?
- 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’?
- The population of City X is 40% of the population of city Y. The population of city X is what percent of city X and city Y together?
- Tk. 385 has been divided among A , B,C in such a way that A receive 2/9th of What B and C together receive . Then A's share is?
- On an average Dr. Maruf attends 12 patients per day and Dr. Mehdi attends 16 patients per day. If Dr. Maruf's charge is1 1/2 times of Dr. Mehdi who earns Tk. 72,000 per month, what is the monthly income of Dr. Maruf?
- Mahib walked for two days. On the second day he walked 2 hours longer and at an average speed 1 mile per hour faster than he walked on the first day. If during the two days he walked a total of 64 miles and spent a total of 18 hours walking, what was his average speed on the first day?
- An error 2% in excess is made white measuring the side of a square. The percentage of error in the calculated area of the square is:
- BUP basketball team that has played 2/3 of its games has a record of 17 wins and 3 losses. What is the greatest number of the remaining games that the team can lose and still win at least 3/4 of all of its games?
- P, Q, and R start a business. P invests 3 times as much as Q invests and Q invests 2/3 rd as much as R invests . Find the ratio of capitals of P, Q and R?
