In a class test +3 marks are given for every correct answer ,-2 for every wrong
answer and 0 for not attempting. i) Raja scored 20 marks. If he got 12 correct
answers, how many questions did he attempt in all?
Answers
Answered by
1
Answer:
20 attempted
Step-by-step explanation:
12 correct ( 12 questions)
got 20 marks
means initially without negitive marking he may got 12×3=36
but with -ve marking got 20 marks so
36-20=16
16 negitive marks
16÷2=8 means 8 queations
12+8 = 20 questions attempted
Similar questions