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Let present age of A be x years. => 120% of (x - 5) = 40% of (x + 5) => 3(x - 5) = (x + 5) => 3x – 15 = x + 5 => x = 10 years
The average of marks obtained by 50 candidates was 56. If the average of the passed candidates was 60 and that of the failed candidates was 50, then th...
The combined average weight of 8 copies and 5 books is 150 grams. If the average weight of the copies is 180 grams, find the average weight of the books.
S1 is a series of 5 consecutive prime numbers starting from the second lowest prime number. S2 is a series of 5 consecutive odd numbers whose first term...
The average age of each of the 20 employees in an IT company is 20 years. When you include the age of the Team leader, the company's average age becomes...
A company has 12 employees, including 8 engineers and 4 managers. The average salary of the engineers is E rupees, and the average salary of the manager...
Average marks scored by Vineet in five subjects are 75. The average marks scored by him (excluding his highest and lowest marks) are 60 and lowest marks...
The average price of two cars, namely 'M' and 'N' is Rs. 45,000 whereas the average price of cars 'N' and 'O' is Rs. 50,000. If the average price of car...
There are 4 numbers – A, B, C & D. B is 25% more than A and D is equal to average of A & C. Ratio of A to C is 3 : 4 and C is 5 more than B. Find valu...