Question
The average age of a husband and a wife was 25 years
when they were married 4 years ago. The average age of the husband, the wife, and their child, who was born during the interval is 20 years now. How old is the child now?Solution
ATQ, Given that, 4yrs. back, the average age of a couple=25yrs. Then, the total==25×2yrs.=50yrs. After 4yrs. the sum will increase by 4×2yrs.=8yrs. Let the child's age=xyrs. Then the toal age of the family=(50+8+x)yrs=(58+x)yrs. Then, by the given condition, = (58+x)/3 =20 =58+x=60 = x = 2yrs
In a train, 45% of the passengers are females. Out of total number of passengers, 65% have unreserved tickets out of which 18% are females. How much per...
P gave 70% of the amount he had to Q. Q gave 2/5th of that amount to R. After paying Rs.260 to the shopkeeper out of the amount he gets from ...
Two students appeared at an examination. One of them secured 18 marks more than the other and his marks were 62% of the sum of their marks. Find the mar...
In the Reebok factory, there are two units of workers, I and II, with a strength ratio of 2:1. The ratio of male to female in Unit I is 3:1, and in Unit...
A gave 45% of the amount he had to B. B gave 2/3rd of what he received from A to C. After paying Rs. 240 to the taxi driver out of the amount he gets fr...
5% of a = b, then b% of 20 is the same as __________.
- Rohit purchased a mobile phone for Rs. 18,500 and sold it for Rs. 21,465. Find the percentage of profit he made.
- A number is first increased by 30% and then decreased by 30%. The overall change in number is:
A shopkeeper marks an item at ₹800 and offers a 20% discount. He still makes a profit of 25%. What is the cost price of the item?
In a company, 45% of the workforce consists of females. The number of male employees exceeds that of females by 350. What is the equivalent of 40% of th...
Relevant for Exams:
