6th Grade Math : Number Sense

Study concepts, example questions & explanations for 6th Grade Math

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Example Questions

Example Question #1 : 6th Grade Math

If candidate A receives \(\displaystyle 1\) vote for every \(\displaystyle 3\) votes that candidate B receives. At the end of the election candidate B has \(\displaystyle 320\) votes. How many votes did candidate A get?

 

Possible Answers:

\(\displaystyle 320\)

\(\displaystyle 3\)

\(\displaystyle 1\)

\(\displaystyle 106\tfrac{2}{3}\)

Correct answer:

\(\displaystyle 106\tfrac{2}{3}\)

Explanation:

In order to solve this problem we need to create a ratio with the given information. It says that for every \(\displaystyle 1\) vote cast for candidate A, candidate B got \(\displaystyle 3\) votes. We can write the following ratio.

\(\displaystyle A:B\rightarrow\frac{A}{B}\)

Now substitute in the given numbers.

\(\displaystyle 1:3\rightarrow \frac{1}{3}\)

We know that candidate B received \(\displaystyle 320\) votes. Write a new ratio.

\(\displaystyle A:320\rightarrow\frac{A}{320}\)

Now, use the original relationship to create a proportion and solve for the number of votes that candidate A received.

\(\displaystyle \frac{1}{3}=\frac{A}{320}\)

Cross multiply and solve for \(\displaystyle A\).

\(\displaystyle 3(A)=320(1)\)

Simplify.

\(\displaystyle 3A=320\)

Divide both sides of the equation by \(\displaystyle 3\).

\(\displaystyle \frac{3A}{3}=\frac{320}{3}\)

Solve.

\(\displaystyle A=106\tfrac{2}{3}\)

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