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xz_007 [3.2K]
3 years ago
15

If there's a three day rain forecast for the probability of rain , 70% Friday, 70% Saturday, 70% Sunday A) work out the probabil

ity that it will rain on all three days B) work out the probability that it will rain on exactly two consecutive days
Mathematics
1 answer:
jeyben [28]3 years ago
3 0

Answer:

a) 34.3%

b) 49%

Step-by-step explanation:

In order to find the probability of a sequence of events, we need to multiply each individual probability by the others in decimal form. Therefore, we need to turn these probabilities into decimal form by dividing them by 100 like so..

70% / 100 = 0.70

Now we multiply all of them together and multiply the product by 100 to get the percentage.

0.70 * 0.70 * 0.70 = 0.343

0.343 * 100 = 34.3%

34.3% is the probability of it raining on all three days. Now to find the probability of it raining on two consecutive days we do the same but multiply only 2 probabilities

0.70 * 0.70 = 0.49

0.49 * 100 = 49%

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The median of a data set 8, 21, 17, and 13 is 15. If 17 is changed to 18, what will be the new median? a. 15.5 c. 50 b. 17.5 d.
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Answer:

Option A) 15.5 is correct

The new median for the new data set is 15.5

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Given data set is 8,21,17,13

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First order the given set of data into least to greatest

The ordered set is 8,13,17,21

Since the given set of data is even

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Median is the mean of two middle values in the data set

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To find the median :

First order the new set of data into least to greatest

The ordered set is 8,13,18,21

Since the given set of data is even

We can take two midvalues of new data in the set

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