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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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