The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
A. 5
B. 8
C. 10
D. 12
E. 15
সঠিক উত্তরঃ
E.
15
Explanation:
Type explanation here...
Related Questions (Any University/Year)
- 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?
- The average weight of 3 men is 53 kg. None of them weighs less than 51 kg. What is tha maximum possible weight (in kg of a person in that group?
- The daily rate of a hotel room that accommodates 4 people is Taka 3900 for one person and Taka x for each additional person. If 3 people take the room for one day and each pays Taka 2100 for the room, what is the value of x?
- Two hours after train A has started its journey, train B started from the same point to the same direction at a speed of 18 km/h. If the speed of train A is 9 km/h then how many hours would it take for train B to catch the first train?
- ডাক্তার রোগীকে প্রতি ২ ঘন্টা পর পর খাওয়ার জন্য ৬টি বড়ি দিলেন। শেষ বড়িটি রোগী কত ঘণ্টা পরে খাবেন?
- যদি ৪২.৪২=K(১৪+m/৫০), যেখানে k এবং m ধনাত্মক পূর্ণসংখ্যা এবং m
- if one half of female students enjoy watching movies and one-third of male students do not like to watch movies, what frictional part of the student body enjoys watching movies?
- 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?
- A merchant was selling an item at a certain price, then marked it down 20% for a spring sale. During the summer , he marked the item down another 20% from its spring price . If the item is sold at the summer price then, what percent of the original price did it sell for?
- Anwar can fill a pool with buckets of water in 30 minutes, Bobby can do the same job in 45 minutes, and Dipu can do the same job in \(1\frac{1}{2}\) hours. How quickly can all three fill the pool together (in minutes)?
- During a particular day, x number of applicants came to IBA to submit their applications before lunch. Of them 70% were male applicants. On the same day, y number of applicants came to submit their application after lunch and all of them were male applicants. On that particular day , the ratio of male applicants to female applicants was 4:1. Calculate y in terms of x.
- 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?
- 55 men can finish á work in 42 days. How many additional men must be engaged to complete the work 9 days earlier?
- 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.
- একটি ড্রয়ারে ২০টি মোজা আছে। ৬০% মোজা হলো লাল আর বাকিগুলো নীল। না দেখে ন্যূনতম কতগুলো মোজা ড্রয়ার থেকে তুললে দুটো নীল মোজা অবশ্যই উঠবে?
- Lamisa's age is 5 years more than twice Galib'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?
- রাবেয়া একটি বালিকা শ্রেনির যে কোনো প্রান্ত থেকে একাদশ অবস্থানে আছে। শ্রেনিতে মোট বালিকার সংখ্যা কত?
- If one number exceeds another number by 13 and the large number is 3/2 times the smaller, then the smaller number is-
- If x and y are integers and -6< x ≤ 7 and -3≤ y ≤ 9, then which of the following CANNOT be a value of xy?
- If 14 farmers plough a field in three hours, how long will it take if 15 farmers to do the same job?
- A trader incurs a loss of 10% from selling an item , if the selling price was taka 200 more he would have made a profit of 15% . What was the cost of the item ?
- Successive discount of 25% and 20% are equal to a single discount of -
- In a certain school, the ratio of Seniors to Juniors is 5:4, and the ratio of Seniors to Sophomores is 6:5. What is the ratio of Juniors to Sophomores?
- Instruction: Each problem consists of a question followed by two statements. Decide whether the data in the statements are sufficient to answer the question. Dipu (D) is 15 years older than his brother Enam (E). \((D = E + 15)\). How old is Dipu? (1) Twenty years ago, Dipu's age was twice that of Enam. (2) Ten years later, Enam's age will be \(\frac{3}{4}\) (assuming the symbol is a typo for a fraction like \(\frac{3}{4}\) or the solution is based on the logic of sufficiency) that of Dipu.
- In a class of 200 students ,40 % are girls. 25% of the boys and 10% of the girls signed up for a tour to Cox's Bazar .What percent of the class signed up for the tour?
- In a 500m race, the ratio of speeds of two contestants A and B is 3: 4. A has a start of 140m. Then A wins by-
- A tank contains 10,000 gallons of water. Each week 500 gallons of water evaporates from the tank. Water sells for $0.50 a gallon now, and the price of water increases by 5 cents a week. In dollars, what will the value of the water in the tank be x weeks from now?
- Mother's age today is thrice as her daughter's . After 10 years it would be just double. How old is the daughter today?
- যদি x<y, 2x=A এবং 2y=B হয়, তাহলে-
- For a picnic, a bus was rented for Tk. 2400 and it was decided that every passenger would have to share the fare equally. But due to the absence of 10 passengers, fare per head was increased by Tk. 8. How many passengers did go by the bus?
- If the price of onion goes up by 25%, by how much should usage be reduced in order to keep the total expense for onion as before?
- The Value Added Tax of retail sales is 5% If a customer pays BDT 150 VAT. then what is the value of his / her total shopping bill ?
- একটি সংখ্যা ৩০১ হতে যত বড় ৩৮১ হতে তত ছোট। সংখ্যাটি কত?
- Instructions: DO NOT USE CALCULATOR. Figures are not drawn to scale. Arif can do a work in 12 hours. Arif finished two-thirds of the work and the remaining portion of the work was done by Babu, whose rate of working is just 20% of what Arif can do. How long did it take Babu to finish the remaining work in hours?
- A bus uses one gallon of petrol to travel 15 km. After a tune-up, the bus travels 15% farther on one gallon. How many gallons of petrol will it take for the bus to travel 150 km after a tune-up?
- ৫০ পয়সা ১০০ টাকার কত ভগ্নাংশ?
- 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?
- In the trapezoid, ∠CAB = ∠DBA =60° and AC = DB = 10 cm. Find the area of the trapezoid.
- In a group of four people, the heights of the group members are 5 feet 4 inches, 5 feet. 5 feet 6 inches, and 4 feet 10 inches. The average height of the group members is
- The difference between the interests received from two different banks on Taka 500 for 2 years in Taka 2.5. The difference between their rates is_____.