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STALIN [3.7K]
3 years ago
7

There is a 20% chance that it will snow on Monday and a 40% chance on Tuesday. What is the probability that it will NOT snow on

both Monday and Tuesday?
Mathematics
2 answers:
andrezito [222]3 years ago
8 0
. Solve: 5x < 9x-1 / 2 

<span>-4x < - 1/2 , now divide by -4 and switch signs </span>

<span>x > 1/8 </span>


<span>2. There is a 20% chance that it will snow on Monday and a 40% chance on Tuesday. What is the probability that it will NOT snow on both Monday and Tuesday? </span>

<span>P( NOT snow on both Monday and Tuesday) = (1-.2)(1-.4) = 12/25 </span>

<span>c. 12/25 </span>


<span>3. The total cost of renting a sailboat is $120 plus $60 a day. How many days was a sailboat rented if the total cost was $360? Solve. </span>

<span>120 + 60d = 360 </span>

<span>60d = 360 - 120 = 240 </span>

<span>d = 4 </span>



<span>4. Two cards are chosen at random without replacement from a deck of 52 cards containing 4 kings. Which expression could be used to find the probability of choosing two kings? </span>

<span>b. 4/52 x 3/51 </span>

<span>There are 4 x 3 ways to pick 2 kings </span>

<span>There are 52 x 51 ways to pick any two cards</span>

lapo4ka [179]3 years ago
7 0
P(Event) = 4/5 * 3/5 = 12/25

----------------------

Y=Yes=Will Snow

N=No=Won't Snow

There is a 20% chance (1/5) that it will snow on Monday. This means that there is an 80% (4/5) chance that it won't snow on Monday.

Y, N, N, N, N

There is a 40% chance (2/5) that it will snow on Tuesday. This means that there is a 60% chance (3/5) that it won't snow on Tuesday.

Y, Y, N, N, N

-----------------------

Create a table for combinations N, N or Y, N or N, Y or Y, Y:

*Where N, N place (X). Where Y, N or N, Y or Y, Y - place (O).

   : Y  N  N  N  N
.................................
Y : O  O  O  O O
Y : O  O  O  O O
N : O  X  X  X  X
N : O  X  X  X  X
N : O  X  X  X  X

The combination N, N represented with (X) appears 12 times out of 25 which is your answer (12/25).
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A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape....
frosja888 [35]

Answer:

About 41.5%

Step-by-step explanation:

<em>Given:</em>

<em>A bowl has 8 green grapes and 15 red grapes. Henry randomly chooses a grape, eats it, and then chooses another grape.</em>

<em>To Find:</em>

<em>What is the probability that both grapes are red?</em>

<em>Answer choices:</em>

<em>about 39.7%</em>

<em>about 41.5%</em>

<em>about 42.5%</em>

<em>about 44.5%</em>

<em>Solution:</em>

<em>Since, there are 8 green grapes and 15 red grapes, the total number of grapes is 23 .</em>

<em>As the red grapes are 15..</em>

<em>Thus,</em>

<em>The probability of choosing a red grape the first time is 15/23.</em>

<em>Because out of the total 23 grapes only 15 were red grape.</em>

<em>The probability of choosing the red grape the second time will be 14/22. Because the number of red grapes has already decreased by one and so is the total number of grapes after first choice</em>

<em>Hence, the probability of choosing or eating two red grapes will be :</em>

<em>15/23×14/22</em>

<em>=105/253</em>

<em>=0.415</em>

<em>= 41.5%</em>

<em>Therefore, the probability that both grapes are red is about 41.5%</em>

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2 years ago
A conical-shaped umbrella has a radius of 0.4 m and a height of 0.45 m. Calculate the amount of fabric needed to manufacture thi
GenaCL600 [577]

Answer:

0.76m²

Step-by-step explanation:

In the above question, we are given the following information.

Radius = 0.4m

Height = 0.45m

To solve this question, The umbrella is CONICAL in shape and it has no BASE, we would be finding the lateral surface area of a cone. Since we are given height and radius :

Lateral Surface Area of a cone =

πr√(h² + r²)

= π × 0.4√(0.45² + 0.4)

= 0.7566m²

≈ Approximately = 0.76m²

Therefore, the amount of fabric needed to manufacture this umbrella is 0.76m²

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Sergio039 [100]

Answer:

its 3

Step-by-step explanation:

i know that bc u keep mince

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