Question

In a Science test, +3 marks are given for every correct answer and –1 mark are given for every incorrect
answer. Sameer attempted all the questions and scored +20 marks though he got 10 correct answers.
a) How many incorrect answers has he attempted?
b) How many questions were given in the test

Answer 1

Answer:

a)10 incorrect answers

b)30questions

pl mark me as the brainliest

Answer 2

Answer:

a) 10

b) 20

Step-by-step explanation:

For 10 answers he got +20, but he should've got 30 for 10 answers (each answer carries +3 so 3*10 = 30) it means he got 30 - 20 = 10 less than 30. For each wrong answer -1 mark are given, so for 10 wrong answer -10 marks.

a) Hence we can conclude he attempted 10 incorrect answers.

b) He attempted 10 correct & 10 incorrect answers. So there were 10+10= 20 questions. given in the test.