The ratio of the present ages of a son and his father = 3:7 His mother and father = 6:7 Father : Mother = 7:6 Son : Father = 3:7 Son : Father : Mother = 3:7:6 4 years ago, Son : mother = 1:4 Let the age of son = 3x Father = 7x Mother = 6x `(3x-4)/(6x-4)` =`1/4` 12x - 16 = 6x- 4 12x- 6x= - 4 +16 6x= 12 x = 2 Present age of son = 3 × 2 = 6 years
An army lost 20% its men in war, 20% of the remaining due to diseases and 20% of the rest were disabled. Thus, the strength was reduced to 64,000 active...
'M' and 'N' have a combined income of Rs. 1,80,000. 'M' spends 65% of his income, whereas 'N' spends 60% of her income, resulting in 'N's savings being ...
A company has a certain number of employees. Initially, 60% of the employees were assigned to the research department, 20% to the marketing department, ...
What is the value of √25% =?
A man spends 22% and 14% of his monthly salary on rent and transportation, respectively. Out of the remaining money, he spends 32% on food and 47% on en...
In a city, the number of persons travelling by bike is 72.5% the number of persons travelling by metro. The number of persons travelling on foot is 60% ...
If the amount on a certain principal in 3 years at 12% rate of interest compounded annually is Rs 12,000, what will be the amount (in Rs) after the 4th ...
In each population, 30% of the population is affected with asthma out of which 90% of asthma patients used to work in flour mills. If 30% of the total p...
The population of the town is 270,000 4/9th of them are males and the rest are females. 50% males and 40% females are married. Find the unmarried popula...
In an examination having total 300 questions, in the first section having 180 questions. A student got 75% marks in first section, but he got 83% marks ...
