SOLUTION: in an examination , a student attempted 15 questions correctly and secured 40 marks. if there are two types of questions ( 2 ,marks and 4 marks questions.how many questions of 2,ma

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: in an examination , a student attempted 15 questions correctly and secured 40 marks. if there are two types of questions ( 2 ,marks and 4 marks questions.how many questions of 2,ma      Log On


   

Question 838655: in an examination , a student attempted 15 questions correctly and secured 40 marks. if there are two types of questions ( 2 ,marks and 4 marks questions.how many questions of 2,marks did he attempt
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Let x represent number of 2 mark questions 

 2x + 4(15-x) = 40 ****

     20 = 2x

      x = highlight%2810%29  2 mark questions 

CHECKING our answer***

 20 + 4*5 = 40marks