Question

In a test +4 marks for correct answer and (-2) marks for incorrect answers ishaan answered all 30 questions oit of which 25 answers were incorrect.What was ishaan's total score?​

Answer 1

Answer:

In a test +4 marks for correct answer and (-2) marks for incorrect answers ishaan answered all 30 questions oit of which 25 answers were incorrect.What was ishaan's total score?

Step-by-step explanation:

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Answer 2

let

correct Mark's for answer = 4

incorrect Mark's for answer = -2

x = incorrect answer

25 = correct answer

30 = total answer

x×4 + 25 × ( - 2 ) = 30

4x +.( -50 ) = 30

4x - 50 = 30

4x = 30 + 50

4x = 80

x = 80 / 4

x = 20

correct = 20

incorrect = -50

so.....20 + ( - 50 ) = 20 - 50 = -30

total Mark's scored by ishaan = -30