Question. In a test (+5) marks are given for every correct answer and (-2) marks are
given for every incorrect answer.
Radhika answered all the questions and scored 30 marks and get 10 correct answers
b) Jay also answered all the questions and scored (-12) marks though he got 4 correct
answers. How many incorrect answers had they attempted?
given for every incorrect answer.
Radhika answered all the questions and scored 30 marks and get 10 correct answers
b) Jay also answered all the questions and scored (-12) marks though he got 4 correct
answers. How many incorrect answers had they attempted?
Answers & Comments
Here you go...
Let x be the number of incorrect answers she got. She got 10 correct answers.
5.10+(−2).x=30
50−2x=30
−2x=30−50=−20
x=−20−2=10
Hence number of incorrect answers is 10
[A dot '.' represents multiplacation sigh]
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