Answer:
Priya knows as (x) and the number of guessed answers as (y). Given that Priya secured 50 marks out of 100, we can write the linear equation as follows:
[ \text{Total Marks} = \text{Marks for Correct Answers} - \text{Marks for Incorrect Answers} ]
The total marks are 50:
[ 50 = x \cdot 1 - y \cdot 0.25 ]
Simplifying the equation:
[ 50 = x - 0.25y ]
Step-by-step explanation: