Saturday, September 7, 2013

Roll a cube numbered 1 through 6. What is probability of you rolling 4 or less. Write answer in ratio,decimal and %ROUND TO NEAREST 100th

In a number cube problem like this one, there are six
possible options.  The probability of rolling a four or less means that we are examining
drawing four of the six options.  This means our probability is 4/6, which can also be
shown as 4:6 or 4 to 6.  All three are representations of a
ratio.


Whenever we have a fraction it has to be made into a
decimal, divide the numerator by the denominator.  This means when I divide it, I get
.666666, repeating  (Take 4, hit the divide button on the calculator, and press equals.)
I will roud to the nearest hundredth and call this decimal .67, because the "6" is what
causes me to round up.  To make a decimal into a percent, I simply multiply my decimal
by 100 because literally percent means "of 100."  I can also move the decimal point two
places to the right because it's the same procedure.  When I do this, my percent is
66.66%.  The problem states that I have to round to the nearest one hundredth, so my new
percentage is 66.67%.  In the end, my answers are the
following:


Ratio- 4/6


Decimal-
.67


Percent- 66.67%

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