On his first 5 tests, David received an average score of N points. If on his sixth test, he exceeds his previous average score by 36 points, what is his average score for his first 6 tests? Choose the correct choice:
A) N +12
B) N +6
C) N +3
D) N +8
E) N +18
Total of 1st 5 tests= 5N   6th test score = N + 36   Total of all 6 tests = 6N + 36   Average = N +6   Answer : N +6
<result>B</result>
On his first 5 tests, David received an average score of N points. If on his sixth test, he exceeds his previous average score by 36 points, what is his average score for his first 6 tests?