Math, asked by mathsearch, 1 month ago

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 nikhilrajgone2008
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 stbranham2007
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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