Question

3. A test contains 10 questions. A correct answer is awarded 2 marks, a wrong answer -1 marks and a question not answered is awarded 0 marks. A student attempts 7 questions and gets 8 marks. How many questions did the student answer correctly?​

Answer 1

Answer:

5

Step-by-step explanation:

Let correct attempts be x and incorrect attempts be y

Total attempts = x+y = 7 ...(1)

Total marks = 2x-y = 8 ...(2)

adding (1) and (2)

3x +y-y = 7+8

3x = 15

x = 5 and y = 2

So 5 correctly attempted questions

Answer 2

$\Large{\underline{\underline{\sf{\red{Req}\pink{uir}\green{ed}\:\purple{Ans}\blue{wer}\:\orange{:-}}}}}$

Seee the answer in attachment.