what does the commercial mean when it says, "odds are 9 to 1 you will see mother nature on one of her bad days

Question

does it mean 900%?

its a truck or suv commercial.

thanks

Answer 1

Odds are the ratio of a certain outcome compared to the opposite outcome. In other words, 9 bad days, 1 good day. That's a total of 10 days. So the *probability* of a bad day is 90%. The probability of a good day is 10%.

It's confusing because people often use "odds" and "probability" as synonyms, but they aren't.

Here's another example from commercials. You've heard that one about "4 out of 5 dentists recommend...". You could rephrase that to "the *odds* are 4 to 1 that your dentist will recommend..."

Answer 2

9 times out of 10 is what something will happen (bad days).
That means, 9 over 10
which 0.9. Expressed in percentage,
0.9 x 100 = 90 (There are two zeros in 100. So, move the decimal two units. that is, a 9 and a 0)

Therefore you can be 90% sure that bad days will occur.

Answer 3

odds of p to q means the event in discussion will occur p/(p+q) times...

thus out of 10 days... there will be 9 bad days...
it is 90%

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