Question

CLASS 7
1.
In a test, +4 marks are given for every
correct answer and -1 mark are given for
every incorrect answer.
i) Ravi attempted all the questions and scored
+30 marks though he got 10 correct answers.
How many incorrect answers has she
attempted?
ii) Sameera scored - 12 marks. She got 16
incorrect answers. How many correct
answers has she attempted?
​

Answer 1

Answer:

(I) ravi attempt 2 incorrect answer

here 8*4=32 and 2 are incorrect so 32-2=30

(ii) 1 correct answer

Explanation:

if it's helpful then please mark me as brainliest

Answer 2

Explanation:

1 / For every correct answer,

mark is +4

for 10 correct answer,

mark is 10×(+4) = +40

but his mark is +30

so , (40 - 30 ) = 10

So, -1 is for 1 incorrect answer

-10 is for (-10)÷(-1) = 10

So , Ravi attempted 10 incorrect answer.

if you try the reverse you will get the second answer too.