Ajar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?
A. 25
B. 30
C. 35
D. 40
সঠিক উত্তরঃ
C.
35
Explanation:
Related Questions (Any University/Year)
- If Mohan buys a chair at 75% of its value and sells it for 20% more tan its value, his profit will be -
- 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?
- 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?
- 55 men can finish a piece of work in 42 days. How many additional men must be engaged to complete the work 9 days earlier?
- Sadman has two rectangular fields. The larger field has twice the length and four times the width of the smaller field. If the smaller field has area K, then the area of the larger field is greater than the area of the smaller field by what amount?
- In a local election X and Y contested. X won the election as the ratio to his votes and those of Y was 4:3 The total number of voters was 5810, of which 910 , did not vote . what is the margin of votes by which Y was defeated?
- A student multiplied a number by 3/5 instead of 5/3 , What is the percentage error in the calculation?
- 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?
- Two workers, working separately but at the same speed, take hours 40 minutes to complete a particular task, How long will one of these two workers take to complete the same task alone?
- 9 numbers are written in ascending order, middle number is average of that nine numbers. Average of five larger numbers is 68 and also average of five smaller numbers is 44. What is the sum of all nine numbers?
- The average of 5 numbers is 40. If 2 more numbers, with an average of 21, are added to these numbers, what will be the average of the combined 7 numbers?
- Rehnuma has 16 jellybeans in her pocket. She has 8 red ones, 4 green ones, and 4 blue ones. What is the minimum number of jellybeans she must take out of her pocket to ensure that she has at least one of red color?
- হামিদ ফাহিমকে ১১০টি মার্বেল এবং জামালকে ৭৫টি মার্বেল দেওয়ার পর তার কাছে ৩১৫টি মার্বেল ছিল। হামিদ শতকরা কত ভাগ মার্কেল এ দু'জনকে দিয়ে দিয়েছিল?
- একটি প্রতিষ্ঠানের ৪০% কর্মচারী আন্ডারগ্রাজুয়েট অবশিষ্ট কর্মচারীদের ৫০% গ্রাজুয়েট এবং অবশিষ্ট ১৮০ জন পোস্ট গ্রাজুয়েট। প্রতিষ্ঠানটির কত জন কর্মচারী গ্রাজুয়েট?
- Two boats on the opposite shores of a river start moving towards each other. When they pass each other they are 750 yards from one shoreline. They each continue to the opposite shore, immediately turn around and start back. When they meet again they are 250 yards from the other shoreline. Each boat maintains a constant speed throughout. How wide is the river?
- There are 40 socks in a drawer. 70% of the socks are red and the rest are blue. What is the minimum number of socks that must be taken from the drawer without looking in order to be certain that at least two red socks have been chosen?
- If \(x/z\) is more than \(y/z\), then \(y = ?\)
- 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?
- In a class 60% of the students enrolled for Math and 70% enrolled for Economics... what % of the students of the class did not enroll for either of the two subjects?
- If each photocopy of a manuscript costé 4 cents per page, what is the cost, in cents, to reproduce x copies of an x-page manuscript?