Please help me guys questions no (iii)
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Answer:39 would have been answer if rounded by: 38.66666666666667
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Step-by-step explanation:
Let number of correct answers be x and number of incorrect answers be y.
As per given conditions,
3x - y = 40 ... (1)
4x - 2y = 50... (2)
(1) * (2)
6x - 2y = 80 ... (3)
Subtracting (2) from (3), we get,
2x = 30 x = 15
y = 3x - 40 = 45 - 40 = 5
Total number of questions in the test = 15 + 5 = 20
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