In a class test (+5) marks are given for every correct answer and (-3) marks are given for every incorrect answer.If Rakesh scores 23 marks by attempting 19 questions.How many questions has he attempted correctly and how many has he attempted incorrectly?

2
09
10-correct and 9-incorrect

Answers

  • Brainly User
2014-03-30T22:30:51+05:30
Let x be number of correct and y be number of wrong
x+y=19
5x-3y=23
y=19-x
5x-3(19-x)=23
5x-57+3x=23
8x=80
x=10
y=19-10=9
therefore he has attempted 10 correct and 9 wrong

0
2014-03-30T23:12:34+05:30
Let no. of correct answers be x. no. of incorrect would be equal to 19-x. total score =23
so
5x- 3( 19- x)=23
8x=80
x=10
and y=19-10=9
0