In a test with 26 questions, five points were deducted for each wrong answer and eight points were added for every correct answer. How many were answered correctly if the score was zero?
Answers
Answered by
30
if x no. of question is wrong and y no. of question is correct then
-5*x+8*y=0 and x+y=26
by solving we get
x=16 & y=10
-5*x+8*y=0 and x+y=26
by solving we get
x=16 & y=10
Answered by
42
Answer:
10 questions are correctly answered.
Step-by-step explanation:
Given,
Total question = 26,
Let x be the number of questions which are correct,
⇒ The number of questions that are incorrect = 26 - x,
Now, five points were deducted for each wrong answer and eight points were added for every correct answer,
Thus, the total score = 8x - 5(26-x)
According to the question,
8x - 5(26-x) = 0
⇒ 8x - 130 + 5x = 0
⇒ 13x = 130
⇒ x = 10
Hence, 10 questions are correctly answered.
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