Question
Average of 20 numbers is 90. Average of first 8 numbers
is 114 while average of last nine numbers is 40. If ninth number is 25% less than the tenth number which is equal to the eleventh numbers then find the tenth number.Solution
Sum of ninth, tenth and eleventh number = 20 × 90 – 8 × 114 – 9 × 40 = 528 Let tenth number = x = eleventh number So, ninth number = 0.75 × x = 0.75x So, x + 0.75x + x = 528 Or, 2.75x = 528 Or, x = 192
Three individuals, L, M, and N, invest Rs 28,000, Rs 35,000, and Rs 42,000 respectively in a business. At the end of the year, they earn a profit of Rs ...
P and Q started a business by investing Rs.8000 and Rs.6400 respectively. After 7 months, Q increased his investment by a certain percentage such that a...
- A started a venture with Rs. (P + 1500). After 6 months, B entered with Rs. 2P. If the ratio of B’s profit share to A’s is 6:7, find (P − 500).
A and B started a business with investments in the ratio of 10:11 respectively. If after 2 year, the profit earned by A is Rs. 1880, then find the total...
‘A’ and ‘B’ started a business by investing Rs. (x + 200) and Rs. (x – 800) for 8 months and 7 months, respectively. If the profit share of �...
Anil started a business by investing some money and Mukesh invested Rs. 10000 more than that of Anil. Anil remained in business for 5 months and Mukesh ...
A and B entered into a business investing Rs. (x + 70) and Rs. (x – 40) respectively. After one year they invested Rs. 120 more and Rs. 100 more respe...
A starts business with Rs.11000 and after 8 months, B joins with A as his partner. After a year, the profit divided in the 5:9. What is B’s contribut...
Ms. Neha and Ms. Tara launched a startup with a total investment of Rs. ‘x’. Neha's share in the initial investment was 45%, and Tara invested the r...
- ‘U’ and ‘V’ invested Rs. 8100 and Rs. 5400 respectively for 5 and 9 months. U retained 30% of his profit after donating the rest. He received Rs. 1...
Relevant for Exams:
