Question
 A mixture contains alcohol and water in the ratio 5:3.
If 4 liters of water are added to the mixture, the ratio becomes 5:7. What is the initial quantity of the mixture?Solution
ATQ,
Let the initial quantities of alcohol and water be 5x and 3x respectively. After adding 4 liters of water, the quantity of water becomes 3x+4, and the new ratio is 5:7. 
Cross-multiply and solve:
7(5x) = 5(3x + 4) 35x = 15x + 20 20x = 20 x = 1
Thus, the initial quantity of the mixture is 5x + 3x = 8x = 8 liters.
What is malware?
Given below are two statements
Statement I:Â The use of ICT in organizing teaching-learning programmes in the universities has the potential ...
_______ selects, interprets and executes instruction in CPU
Which Windows utility allows users to browse folders and manage files on a computer?
The minimum number of page frames that must be allocated to a running process in a virtual memory environment is determined by ____________
JS Kilby developed which chips?
The shortcut for copying selected content is:
A device needed to communicate with computers using telephone lines is?
In Google Sheets, which feature allows the warden to see when and who last edited any given cell?
Which of the following devices uses flash memory technology?
