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Sample Question 17:
Step 1: Calculate the total score for the first six tests by multiplying the average by the number of tests. This gives you \(84 \times 6 = 504\).
Step 2: Similarly, calculate the total score for the first seven tests which comes out to be \(85 \times 7 = 595\).
Step 3: Substract the total score of the first six tests from the total score of the first seven tests to find the score of the seventh test. This gives \(595 - 504 = 91\).
So, the correct answer is \(\textbf{(D)}\ 91\).
If your average score on your first six mathematics tests was \(84\) and your average score on your first seven mathematics tests was \(85\), then your score on the seventh test was
\(\textbf{(A)}\ 86 \qquad \textbf{(B)}\ 88 \qquad \textbf{(C)}\ 90 \qquad \textbf{(D)}\ 91 \qquad \textbf{(E)}\ 92\)
Answer Keys
Question 17: DSolutions
Question 17Step 1: Calculate the total score for the first six tests by multiplying the average by the number of tests. This gives you \(84 \times 6 = 504\).
Step 2: Similarly, calculate the total score for the first seven tests which comes out to be \(85 \times 7 = 595\).
Step 3: Substract the total score of the first six tests from the total score of the first seven tests to find the score of the seventh test. This gives \(595 - 504 = 91\).
So, the correct answer is \(\textbf{(D)}\ 91\).