Question

Babu wrote a competitive examination which has scoring procedure of 3 marks for correct answer and (-1) marks for wrong answer He had 50 correct answers and 25 wrong answer.How many marks did he score in the examination?​

Answer 1

GIVEN:

$correct \: anwer \: = 3marks$

$wrong \: answer \: = ( - 1)marks$

$no \: of \: correct \: answers \: = 50 \\ no \: of \: wrong \: answers \: = 25$

SOLUTION :

$marks \: for \: correct \: answers \: = 50 \times 3 = 150$

$marks \: for \: incorrect \: answers \: 25 \times ( - 1) = - 25$

$babu \: scored \: = correct \: answers - incorrect \:answers \:$

$= 150 - 25 = 125$

$therefore \: he \: scored \: 125 \: marks$

Answer 2

Answer :

Babu scored 155 marks for the exam

Given :

• Marks given for one correct answer = 3

• Marks given for ‎Total correct answers provided by Babu = 50

• Total incorrect answers provided by Babu = 25

To Find :

• The total marks scored by Babu.

Solution :

→ Total marks scored by Babu for the correct answers :-

= Total no. of correct answers x Mark for each correct answer

= 50 x 3

= 150 marks

Total marks scored by Babu for incorrect answers :-

= Total no. of incorrect answers x Marks for each incorrect answer

= 25 x (-1)

= -25 marks

Total marks scored by Babu for the exam:

Marks for correct answers + Marks for incorrect answers

= 180 + (-25)

= 180 - 25

= 155 marks

Therefore, Babu scored 155 marks for the exam.

Extra Information :

$\bf Some~ operations :$

• (+) x (+) = (+)

• (-) x (+) = (-)

• (-) x (-) = (+)

• (+) x (-) = (-)