Question
A payment of ₹120 is made with ₹10, ₹5 and ₹2
coins. A total of 25 coins are used. Which of the following is the number of ₹10 coins used in the payment?Solution
Total coins used = 25. let the number of ₹10 coins = x Number of ₹5 coins = y Number of ₹2 coins = z Total number of coins = x + y + z = 25 ........(1) Total money = 10x + 5y + 2z = 120 ..........(2) from equation (1), we get z = 25 - x - y put this value in equation (2), we get 8x + 3y = 70 so, if x = 8, then y = 2 then, z = 25 - 8 - 2 = 15 required answer = 8
Which of the following is NOT an example of an operating system?
Which of the following is not true about OLTP?
A control unit in a CPU uses a microprogram to:
Physical limitation of a signal is called?
B-trees and B+ trees are commonly used for indexing in databases to improve the efficiency of:
The SI unit for measuring temperature is:
What is the purpose of an index in a database?
What protocol is used for file transfer between a local computer and a remote server?
What is the purpose of a diode in a circuit?
What is the purpose of a weak entity in the ER model?