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ASHA 777 [7]
1 year ago
11

Bob Bluster, the KNEWS meteorologist, determined that the mathematical odds of $\emph{no rain}$ tomorrow are 11:9. What would a

mathematics student determine as the percent chance there $\emph{will be rain}$ tomorrow? (If the odds of an event happening are $a:b$, then the probability that it occurs is $\frac{a}{a + b}$.)
Mathematics
1 answer:
Ahat [919]1 year ago
8 0

Answer:

45% chance there will be rain tomorrow.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

11:9 odds that there will be no rain

In 11+9 = 20 experiments, in 11 there will be no rain and 9 there will be rain.

Percent change there is rain:

Desired outcomes:

9 experiments(rain)

Total outcomes:

20 experiments

Probability

p = \frac{9}{20} = 0.45

45% chance there will be rain tomorrow.

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Question:

You are in a bike race. When you get to the first checkpoint, you are 2/5 of the distance to the second checkpoint. When you get to the second check point, you are 1/4 of the distance to the finish. If the entire race is 40 miles, what is the distance between the start and the first check point?

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