Question
In a school of 960 students, the ratio of boys to girls is
5:3. During the annual test, 20% of boys and 25% of girls did not pass. What is the number of students who failed the test?Solution
ATQ,
Number of boys = (5/8) × 960 = 600
Number of girls = (3/8) × 960 = 360
Required number of students = 0.20 × 600 + 0.25 × 360 = 120 + 90 = 210
In an interview, a total of 160 employees participated, including 100 men and the remaining women. Among these employees, 80% ach...
A sum of ₹10,000 is invested in two schemes A and B. Scheme A offers 10% per annum and scheme B offers 15% per annum. If the total interest earned aft...
A line with slope m touches the parabola y ² = 4ax. The equation of the tangent is:
In 2023, Department D overspent by 10% of its allocated budget. What is the total expenditure of Department D after the overspending?
A trader marks the price of a product at ₹800 and allows a discount of 15%. If the trader also pays a tax of 5% on the discounted price, what is the t...
A principal of ₹8000 is invested at a compound interest rate of 10% per annum. What will be the amount after 2 years?
What is the mean of the following data given below:
3,7,9,5,11,13,8,12,15,12,4
A company has two departments, A and B. Department A produces an average of 40 items per day. The production ratio of Department A to Department B is 4...
A group of 30 students has an average score of 60 in an exam. If 5 more students join the group and their average score is 70, find the new average scor...
A boat can travel 36 km upstream in 6 hours. The same boat can travel 63 km downstream in 3 hours. What is the speed of the boat in still water?
