Question

In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer .
Roy answered all the questions and scored 30 marks though she got 10 correct?
Find the total number of sums .

Answer 1

Answer:

5∗10+(−2)∗x=30

50−2x=30

−2x=30−50=−20

x=−20−2=10

Hence number of incorrect answers is 10.

Okayyy! I hope this helped, if it did, please don't forget to hit that love button "Thanks"  Also, I had this is my exam this year! I am in 7th

Answer 2

Answer:

Step-by-step explanation:

10 question incorrect :

10 * 5 = 50 marks correct

10 * 2 = 20 marks in correct

so 50 - 20 = 30 marks

so he got 10 question wrong