mohan scored 4 marks more than what we got in previous exam in which he has scored 15 marks whereas Ankit scored 18 marks more than he secured in the last exam when he got 54 who had one shown more improvement
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Answer:
Marks given for one correct answer = 5
So, marks given for 10 correct answers
= 5 X 10 = 50
Radhika's score = 30
Marks obtained for incorrect answer
= 30- 50 = -20
Marks given for one incorrect answer
= (-2)
Therefore, number of incorrect answers
= (−20)÷(−2)=10