Question

In a class (+2) marks are given for every correct answer and (–1)marks are given for every incorrect answer and no marks for not attempting any question . 1. raju scored 30 marks . if he has got 18 correct answer, how many questions has he attempted incorrectly 2. rahul scores - 5 marks in this test though he has got 7 correct answers . how many questions has he attempted incorrectly

Answer 1

Answer:

6 and 19

Step-by-step explanation:

1. Let number of incorrect question be x then,

     ( 18 * 2 ) + (-1 * x ) = 30

     x == 6

Therefore number of incorrect question is 6

2.  Let number of incorrect question be x then,

     ( 7 * 2 ) + (-1 * x ) = -5

     x == 19

Therefore number of incorrect question is 19

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