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saveliy_v [14]
3 years ago
14

Suppose that the probability of a drought in any independent year is 20%. Out of those years in which a drought occurs, the prob

ability of water rationing is ten percent. However, in any year, the probability of water rationing is five percent.
Which of the following is true?
a. 0.01
b. 0.05
c. 0.30
d. 0.02
Mathematics
1 answer:
astraxan [27]3 years ago
3 0

Answer:

the correct option is d. 0.02

Step-by-step explanation:

We have the following events:

x: A drought occurd

y: Water rationing.

Therefore, according to the plaster we have:

P [x] = 0.20

P [y | x] = 0.10

Now P [it is a drought and water rationing happens] =

P [x n y] = P [y | x] * P [x] = 0.10 * 0.20 = 0.02

Which means that the correct option is d. 0.02

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Elizabeth lives in San Francisco and works in Mountain View. In the morning, she has 3 transportation options (take a bus, a cab
Lesechka [4]

Answer:

4/9

Step-by-step explanation:

The possibilities of transportation: (The first will be for morning, second will be for afternoon)

B, B

B, C

B, T

C, B

C, C

C, T

T, B

T, C

T, T

It is clearly seen that there are 9 transportation options.

(Using cab 1 time we have BC, CB, CT, TC. So four of the transportation methods use cab one time.)

Therefore, the probability that she will use a cab only once is 4/9.  

6 0
3 years ago
Simplify:<br>(ay<br>8<br>6.<br>5x - 25 30 - 6x​
maw [93]

Answer:

-x - 2530

Step-by-step explanation:

5x - 2530 - 6x

5x - 6x = -x

-x - 2530

6 0
3 years ago
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Sierra’s book has 200 pages. If she reads 20% of her, she will have read 40 pages. If Sierra has read 120 pages of her 200 pages
marysya [2.9K]

Answer:

60%

Step-by-step explanation:

Multiply 40 by 3 and you get 120 so then you multiply 20% by 3 and get 60%

5 0
3 years ago
Find the volume <br> 6ft<br> 4ft<br> 3ft<br> (i know it’s not 72)
vlada-n [284]

Answer:

\fbox{Volume \:  of \:  pyramid \:  = 24 ft³}

Step-by-step explanation:

Given:

shape of object = Pyramidal

length of base l= 4ft

width of base w = 3ft

height of pyramid h = 6 ft

To find:

volume of pyramid = ?

Solution:

Volume  \: of \:  pyramid=  \frac{l \times w \times h}{3} \\ Volume \:  of \:  pyramid=  \frac{6 \times 4 \times 3}{3}  \\ Volume \:  of \:  pyramid=  \frac{24 \times  \not3}{ \not3}  \\ Volume \:  of \:  pyramid= 24 \:  {ft}^{3}

\fbox{Volume \:  of \:  pyramid \:  = 24 ft³}

<h3><em><u>Thanks for joining brainly community!</u></em></h3>
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2 years ago
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Answer:

No it dont. Unless ur on a phone. Just answer questions

Step-by-step explanation:

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2 years ago
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