Question
Quantity of water in a 350 litres mixture (alcohol +
water) is 22 litres less than the quantity of alcohol in it. Find the quantity of water to be mixed so that the quantity of alcohol in the mixture becomes 40% of the whole mixture.Solution
Quantity of water in the mixture = (350 – 22)/2 = 164 litres So, Quantity of alcohol in the mixture = (350 – 164) = 186 litres Total quantity of the mixture = 186 x (100/40) = 465 litres Therefore, quantity of water to be mixed = 465 – 350 = 115 litres
In a company, the average salary of 30 employees is ₹40,000. Out of these, the average salary of 20 employees is ₹35,000, and the average salary of ...
The average salary of 24 employees is recorded as ₹ 16,584. If the salary of an employee with value ₹14,526 was entered Wrongly as ₹ 41,238, then ...
Average age of a class of 28 students is 10 years. Average age of the class is increased by 12 months if the age of the teacher is included. Find...
[123 ÷ 8 ÷ 9] × 144 = ? + 12 × 5
The average weight of x persons is 33 kg. The average weight of (x−16) women is 45 kg, the average weight of (x−30) children ...
The average weight of 4 persons is 44 kg. The heaviest person’s weight is 30 kg more than the lightest person’s weight. If the average weight of the...
- What is the average of the squares of the first 31 natural numbers?
The average number of books on history, polity and geography in a library is 150, and the average number of books on history and geography is 140. If th...
A college group of 50 students has an average age of 23 years. 10 new students are added and the average age decreases to 21. What is the average age of...
- The average age of (x + 1) students of a class is 20 years. If the 50 years old class teacher is also included then average age of the class gets increased...
Relevant for Exams:
