In a quiz contest, 2 points are given for every conrect answer and -1 point is given for every wrong answer riyaz scanes 15 points. if he got 9 answers correct, how many answer did he get wrong ?
Answers
Answered by
1
Answer:
Correct option is
A
10
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
Step-by-step explanation:
please make as brilliant
Answered by
4
(。◕‿◕。)
Answer
Let the incorrect / wrong answer be x
Correct answer + Wrong answer = 15
2(correct answer) + [(-1)(Wrong answer)] = 15
2(9) + [(-1)x] = 15
18 + [-x] = 15
-x = 15 - 18
-x = -3
X =3
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