Romila appeared for a maths exam. She was given 100 problems
to solve. She tried to solve all of them correctly but some of them went wrong.
Any how she scored 85.
Her score was calculated by subtracting two times the number
of wrong answers from the number of correct answers.
Can you tell how many problems she solved correctly?
Answer: She
solved 95 problems correctly
Let us assume W = Wrong and R = Right
R - 2W = 85
R + W = 100 / -3W= -15
W = 5
W = 5
R = 95
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