Arif bought 17 pens of three colors - black, green and red which cost Tk 5, Tk 10 and Tk 25 each. The total amount that Arif paid was Tk 205. If Arif bought twice as many green pens as red pens, how many black pens did he buy?
A. 4
B. 5
C. 7
D. 8
Explanation: ধরি, red pen কিনে x টি এবং black pen কিনে y টি। সুতরাং green pen কিনে 2x টি। \(x+y+2x=17\) or, \(3x+y=17...(i)\) এবং \(5y+20x+25x=205\) Or, \(5y+45x=205...(ii)\). \((ii)-(i) \times 5 \implies 30x=120\). Or, \(x=4 \implies 3 \times 4+y=17\). Or, \(y=5\). সঠিক Answer (B)
Related Questions (Any University/Year)
- Which of these is NOT a correct way to find 75% of 25?
- In a survey of the town bogra , it was found that 65% of the people surveyed watched the news on TV, 40% read a newspaper and watched the news on TV, what percentage of the people surveyed neither watched the news on V nor read a newspaper?
- The speed of a motor boat is 20 km/hr. for covering the distane of 15 km the boat took 1 hour more for upstream than downstream. Let speed of the stream be x km/hr, then speed of the motorboat in upstream will be-
- In a basket of fruits ,the ratio of number of apples ,bananas and oranges is 3:4:8 .If the number of apples is 9 ,how many bananas does the basket have?
- 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’?
- In a certain class \(\frac{1}{2}\) of the male and \(\frac{2}{3}\) of the female students speak English. If there are \(\frac{3}{4}\) as many females as males in the class, what fraction of the entire class speaks English?
- 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?
- ১,০০০ টাকা ক ও খ ১ঃ ৪ অনুপাতে ভাগ করে নেয়। খ এর অংশ সে এবং তার মা ও মেয়ের মধ্যে ২ঃ ১ঃ ১ অনুপাতে ভাগ করে। মেয়ে কত টাকা পাবে?
- ২-এর কত শতাংশ ৮ হবে?
- A husband and wife have six married sons . Each of them has four children . The total number in the family is :
- How many times does the digits '4' come to write numbers from 10 to 100?
- 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?
- A sum of BDT 200 will be divided among 5 swimmers, named Emran, Durjoy, Chopol, Billal and Anabi, who have just finished a swimming competition. Everyone will receive at least BDT 5 and no two swimmers will receive the same amount of money. Emran has come \(1^{st}\) and will get BDT 80; Durjoy has come \(2^{nd}\), Chopol is \(3^{rd}\), Billal is \(4^{th}\) and Anabi is last. Moreover, the distribution of money is subject to the following conditions: • No one will get any fractional amount of money. • The swimmer who finishes earlier must receive more money than the swimmer(s) he defeats. What are the greatest and least amount of money, consecutively, that Billal can receive?
- The ratio of the angles of a triangle is 2: 3: 4 calculate the value of the largest angle in the triangle.
- ৩৫০ টাকা দরে ৩ কেজি মিষ্টি কিনে ৪ টাকা হারে ভ্যাট দিলে ভ্যাটের পরিমাণ কত টাকা?
- Ninety-six mangoes are divided among X, Y, and Z in such a way that X received 4 times as many as Z and Z receives 3 times as many as Y. How much did Y receive?
- The members of an association decided to contribute equally to create a fund of Tk. 45,000. Five members refused to contribute, so each of the other members had to contribute additional tk. 15 for that fund. How many members were there in the association?
- In a certain shipment 2% of the boxes shipped were damaged. If the loss per damaged box was Tk. 35 and the total loss due to damage was Tk. 700, how many boxes were shipped?
- এক কিলোমিটার এক মাইলের কত অংশের সমান?
- In the trapezoid, ∠CAB = ∠DBA =60° and AC = DB = 10 cm. Find the area of the trapezoid.
- A sport goods store ordered an equal number of white and yellow tennis balls. The tennis ball company delivered 30 extra tennis ball, making the ratio of white balls to yellow balls 6:5, How many tennis ball did the sport goods store originally order?
- The price of sugar increased by 10%. What percentage of consumption of sugar is to be reduced in order to keep the expenditure on sugar at the same level?
- Rahim is paid twice the hourly wages of Selim, Karim is paid one-third of the hourly wage of Karim is delim paid?
- In a certain apartment building exactly 1/3 of the apartments have two bedrooms and exactly 1/7 of the two-bedroom apartments are front apartments. Which of the following could be the total number of apartments in the building?
- The price of a laptop was sold at 10% discount on the price. If the profit is Tk. 2400 what was the cost of the laptop is TK?
- দুটি সংখ্যার পার্থক্য (1F)16। একটি সংখ্যা (62)10 হলে, অপর সংখ্যাটি কত?
- If \(x/z\) is more than \(y/z\), then \(y = ?\)
- একটি সংখ্যার ৪ গুণের সাথে ১০ যোগ করলে উত্তর হয় সংখ্যাটি ৫ গুণ অপেক্ষা ৫ কম । সংখ্যাটি কত?
- In the trapezoid, <CAB= DBA =60° and AC= DB = 10 cm. Find the area of the trapezoid.
- A sink contains exactly 12 liters of water. If water is drained from the sink until it holds 6 liters of water less than the quantity drained away, then how many liters of water were drained away?
- In Hotel Sea View, the daily rate for an economic room, which can accommodate a maximum of four people, is Taka 800 for one person and Taka X for each additional person. If 3 friends take the room for one day and each pays Taka. 450 for the room, what is the value of X?
- Last year 7000 students took the admission test were the ratio of girls to boys was 6:4.Only 2% of the boys met the cut-off marks. The number of such boys was:
- ৮৮০ এর তিন চতুর্থাংশের এক দশামাংসের অর্ধেক কত?
- If a 60 ml of water contains 20% of chlorine, how much water must be added in order to create a 12.5% chlorine solution?
- The ratio of r to s is 3 to 4. The ratio of s to t is 2 to 9. What is the ratio of r to t ?
- A wholesaler ordered 120 units of a certain product from its producer. The product would be sold at a price of BDT 500 each which was marked 20% over its initial cost. However, the wholesaler could not sell 12 units of that product which were returned to the producer for a refund of 50% of the wholesaler's initial cost. What was the wholesaler's approximate profit or loss as a percentage of his initial cost for the 120 units?
- 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.
- A man purchased equal number of bananas at two different rates- one at the rate of 8 taka per dozen and the other at the rate of 10 taka per dozen. After that, he sold those bananas at an average rate of 11 taka per dozen and thus made a profit of 100 taka. How many dozens of banana did he purchase altogether?
- If one man or two women or three boys can finish a job in 66 days, then find out the number of days in which that work can be done by one man, two women, and three boys.
- In a Class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?
