# Can someone please explain how to do #28?

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This image has been Flagged as inappropriate Click to unflag As it states, "odds" is the ratio that compares the number of favorable outcomes to the number of unfavorable outcomes.  Or:Odds =     Number of favorable outcomes

Number of unfavorable outcomes

As opposed to probability:

Probability =     Number of favorable outcomes   ...

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As it states, "odds" is the ratio that compares the number of favorable outcomes to the number of unfavorable outcomes.  Or:

Odds =     Number of favorable outcomes

Number of unfavorable outcomes

As opposed to probability:

Probability =     Number of favorable outcomes

Number of total outcomes

Given that, many times, especially here, the number of total outcomes = number of favorable outcomes + number of unfavorable outcomes, then the number of unfavorable outcomes = the total number of outcomes - the number of favorable outcomes.  So, that would give us:

Odds =                     Number of favorable outcomes

Total number of outcomes - Number of favorable outcomes

For this problem, on a 6 sided die, there is only one "6".  So, there is only one favorable outcome, the single "6" out of 6 total outcomes.  So, plugging that into the equation:

Odds =  1/(6-1) = 1/5

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