Question
Average age of 30 students is 14 years. If 6 students
leave the class, then the average age decreases by 0.5 years. Find the average age of the students who left the class.Solution
ATQ, Total age of 30 students = 30 × 14 years = 420 years. New average age after 6 students leave = 13.5 years. Total age of 24 students = 24 × 13.5 years = 324 years. Total age of the 6 students who left = 420 − 324 years = 96 years. Average age of the 6 students who left = 96/6years = 16 years.
- Amit and Sumit jointly invested Rs. 4200 and Rs. 2800 in a startup. If the total annual profit is Rs. 9800, what is the difference between their shares of ...
Atul,' 'Bhasker,' and 'Chetna' collaborated in a business, contributing initial amounts of Rs. (p + 300), Rs. (p– 100), and Rs. (p – 300), respectiv...
M and N started a business by investing Rs.5000 and Rs.6000 respectively. After 7 months, M and N increased their investments by 60% and Rs.2100 respect...
Rohan and Deepak invested Rs. 10,000 and Rs. 15,000 respectively. After 3 months, Rohan reduced his investment by Rs. 2,000 and Aman joined with Rs. 20,...
A started a business with an investment of Rs.1500. After some months, B joins the business with an investment of Rs.3000 and after two more months C jo...
A, B and C started a business with initial investments in the ratio 4:5:3, respectively. After one year A, B and C made additional investments equal to ...
‘A’, ‘B’ and ‘C’ started a business by investing Rs. 4,000, Rs. 4,800 and Rs. 3,200, respectively. After 6 months, ‘B’ decreased his inv...
If the ratio of time periods of investment of A and B is 3:5, profit at the end of the year is Rs.120000 and A’s share in it is Rs.20000, then what is...
John and David began a business investing Rs. 50,000 and Rs. 40,000 respectively. Six months later, Emma joined with Rs. 30,000. If the yearly profit wa...
A, B and C invested in partnership. A invest Rs.5000 for 4 months, B invests Rs.2000 for 2 months and C invests Rs.8000 for 2 months. C is working partn...
Relevant for Exams:
