On his first 4 tests, Rajeev received an average score of X points. If on his fifth test, he exceeds his previous average score by 20 points, what is his average score for his first 5 tests?  Options
A) X + 5
B) X + 1
C) X + 4
D) X + 2
E) X + 3
Total of 1st 4 tests= 4X   5th test score = X + 20   Total of all 5 tests = 5X + 20   Average = X + 4   Answer : X + 4
<result>C</result>
On his first 4 tests, Rajeev received an average score of X points. If on his fifth test, he exceeds his previous average score by 20 points, what is his average score for his first 5 tests?