Derek earned 94% out of 100% on a science test. when he received his test back, he saw a minus 17 at the top of his test. The in
equality below shows the relationship between the number of points Derek thought he lost to the number of points he actually lost. -17 < -6
Derek's teacher offered several extra credit points on the test but did not report how many extra credit points were gained at the top of each test. Which statement compares Derek's score to the number of points lost?
A) Derek scored a 71% but received 23 extra credit points for an overall score of 94%
B) Derek scored a 77% but received 17 extra credit points for an overall score of 94%
C) Derek scored an 88% but received 17 extra credit points for an overall score of 94%
D) Derek scored an 83% but received 11 extra credit points for an overall score of 94%
I personally think that the answer is D. In other word, Derek originally scored an 83% but received 11 extra credit points in order to have an overall score of 94%.
Let the amount B pays be £x So, A pays £125 B pays £x They pay in the ration 3:2 Therefore, 125/x = 3/2 Cross multiplying we get, 125 x 2 = 3x 3x = 250 x = £63.33