jerome surveyed 643 skateboarders and found that 209 of the preferred wood skateboards to plastic or aluminum skateboards. based on the number of people surveyed, what is the most reasonable estimation of the percent of skateboarders who preferred wood skateboards?

Question

anonymous · Answer

Take $$\frac{ 209 }{ 643 }$$ and multiply your answer by 100 to get the percent.

anonymous · Answer

do i divide 209 over 643?

anonymous · Answer

yes it is 209 / 643 * 100 to get your percentage

mathmale · Answer

This is "observed probability."  We find the ratio of the count of those who like wood skateboards to the total number surveyed; dividing 209 by 643 produces a decimal fraction which, when multiplied by 100%, produces the desired probability as a percentage.

mathmale · Answer

That probability can be used to predict future outcomes.

anonymous · Answer

so it would be 30%?

mathmale · Answer

Provided your calculation is correct, yes.

anonymous · Answer

thank you

mathmale · Answer

Sure!  Supposing that you were to ask 100 more skateboarders their preference (wood or whatever).  About how many of these 100 would you suppose would prefer wood boards?

anonymous · Answer

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anonymous · Answer

what equation can be used to solve for x?