After M students took a test, the average score was 66%. If the test has 50 questions, what is the least number of questions that the next student has to get right to bring the average score up to 68%?	Choose the correct answer:
A) 2M-34
B) M+34
C) 0.66M+0.68
D) 0.33M+34
E) 3M-33
The total number of correct answers for M students is (0.66)*50*M=33*M   For an average of 68%: (total correct answers) / (M+1) = 0.68*50= 
<gadget id="calculator">0.68*50</gadget>
<output>34</output>
34   Let x be the number of correct answers for the next student.   (x + 33M) / M+1= 34   x + 33M= 34M+34   x = M + 34   The answer is M+34.
<result>B</result>
After M students took a test, the average score was 66%. If the test has 50 questions, what is the least number of questions that the next student has to get right to bring the average score up to 68%?