Question
Vicky and Vinay have their
monthly incomes in the ratio of 7:9. Their monthly expenditures are Rs. 6200 and Rs. 7800, respectively. If the ratio of their monthly savings is 3:4, find the difference in their monthly savings.Solution
We can say that Let monthly income of Vicky and Vinnay be Rs. 7x and Rs. 9x, respectively. ATQ, (7x –6200)/(9x – 7800) = 3/4 28x – 24800 = 27x – 23400 x = 1400 Savings of Vicky = 7x – 6200 = 9800 – 6200 = Rs. 3600 Savings of Vinnay = 9x – 7800 = 12600 – 7800 = Rs. 4800 Hence Required difference = 4800 – 3600 = Rs.1200
The average weight of three men is increased by 5 kg when one of them, whose weight is 100 kg is replaced by another man. What is the weight of the new ...
The average of 11 observations is 60. If the average of first five observations is 58 and that of last five is 56, the sixth observation is
The mean weight of 'w' students in a classroom is 42 kg. When the class teacher, weighing 61.5 kg, is added to the group, the average weight increases b...
The volume of cone is 2695 cm3. If its height is 2.1 cm then find the radius of the cone.
Ram played his first 4 matches with an average of 5 goals per match. However, he couldn't score any goals in the following 3 matches. How many goals doe...
- What is the average of the squares of the first 23 natural numbers?
Deepak spends an average of Rs. 520 on Sundays and Rs. 340 on the remaining days. Find his average spending in a 30-day month starting with Sunday.
The average cost price of 21 pens (having equal cost price) decreased by Rs.3, when one of the pen is replaced by a new pen having cost price of Rs.55. ...
In a company, the average number of employees named Amit and Chinky is 25. The number of Chinky's name employees is 50% higher than the number of Amit's...
The average age of 33 children and their teacher's age are 25 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
