Answer:
56 questions were correctly answered by Frank.
Step-by-step explanation:
Let Frank answered the number of correct questions = x
Let wrong answers given by Frank = y
By statement 1 "Frank answered 80 questions".
Equation will be x + y = 80 ---------(1)
Statement 2 "Frank scored 232 points."
equation will be 5x - 2y = 232 ------(2)
We have to calculate number of correct answers.
Multiply equation (1) by (2) then add it to equation (1).
(2x + 2y) + (5x - 2y) = 160 + 232
7x = 392
x = 56
Therefore, 56 questions were correctly answered by Frank.
