Amna takes a test with 50 questions. Four marks are given
for each correct answer but one mark is taken off for each
question she gets wrong. If Amna scores 168 in the test and
doesn’t attempt 3 questions at all, how many questions did
she answer correctly? (There is no penalty for not attempting
a question in this test that Amna takes)
Answers
Answered by
5
Answer:
39 and half questions incorrect
Answered by
4
Answer:
43
Step-by-step explanation:
correct = x
wrong = 50 - x -3
= 47 -x
result = 4 * correct - wrong
=> 168 = 4x - (47 - x)
=> 168 = 5x - 47
=> 5x = 168 + 47
=> 5x = 215
=> x = 43
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