Question

In a class test (+3)marks are given for every correct answers and-(2)marks are given for every incorrect answers and no marks for not attempting any questions (1)Radhika scores 20 marks .If she has got 12 correct answers.how many questions she attempt incorrect​

Answer 1

Answer:

13

Step-by-step explanation:

Now, we know that for every incorrect answer =−2 marks. So, the total marks for incorrect answers = marks for incorrect answer × number of incorrect answers. Hence, the number of incorrect answers is 13.

Answer 2

☘Answer:-

☆ Solution:-

$marks \: given \: for \: every \: correct \: answer \: = \: 3$

$marks \: given \: for \: 12 \: correct \\ answer = 12\times3\  = 36$

$radhika \: \: obtained \ \: \: 20 \: \: marks \: \: in \: \: the \\ class \: \: test$

$therefore,$

$marks \: given \: for \: one \: incorrect \: answer \\ = \: -2$

$so,$

$no \: of \: incorrect \: answer \:   \\ = -16\times\frac{-1}{2}\ \ \ = 8$

✿$Thus, \\ Radhika \: has \: attempted \: = \: 8\\ incorrect \: questions.$