In a test, 5 marks are given for every correct answer and (-2) marks are given for
every incorrect answer.
(a)
Anjali scored 30 marks. If she got 10 correct answers, how many questions
she answered incorrectly?
(b)
Rohan got 4 correct answers. If he scored (-12) marks in the competition,
how many questions he answered incorrectly?
step by step
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Answer:
(a) Anjali got 10 correct answers, she scored 50 marks and Anjali answered 10 questions wrongly, therefore she got -20 marks. Finally she got 50+(-20) = 30 marks
So Anjali answered 10 questions incorrectly
(b) Rohan answered 4 questions correctly , he got 20 marks . He answered 16 questions incorrectly, therefore he got (-32) marks. finally he got 20+(-32) = -12 marks