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Nookie1986 [14]
3 years ago
5

In a standard normal distribution, the probability that z is greater than zero is

Mathematics
1 answer:
harina [27]3 years ago
7 0

Answer:

50%

Step-by-step explanation:

The distribution is symmetrical about  the y-axis.

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1. Events A and B are dependent, P(A)=20%, P(BIA)=25%. What is P(A and B)?
Blizzard [7]
1. Given that e<span>vents A and B are dependent, P(A)=20%, P(BIA)=25%. What is P(A and B)?
P(BIA)=[P(A and B)]/P(A)
it follows then that:
P(A and B)=P(A)*P(BIA)
P(A)=0.2
P(BIA)=0.25
hence
P(A and B)=0.2*0.25=0.05=5%

2. Given that </span><span> P(A) =12%, P(B)=48% and P(A or B)=50%. What is P(A and B)?
P(A or B)=P(A)+P(B)-P(A and B)
but
P(A)=12%, P(B)=48%, P(A and B)=50%
thus
P(A or B)=12%+48%-50%
simplifying the above we obtain:
P(A or B)=60%-50%=10%

</span>
8 0
3 years ago
What's 250.311 rounded to the nearest tenth?
dimulka [17.4K]

IT IS 250.3.

THANKS                /////////............................

5 0
4 years ago
Read 2 more answers
Select the correct answer.<br> Which statement describes the situation shown in the graph?
Lena [83]

Answer:

Xray vision, where is the graph you want answers like this?

Step-by-step explanation:

7 0
4 years ago
A room has an area of 60 square meters and a perimeter of 32 meters what are the length and width of the room
kupik [55]
We can solve this by looking at pairs that equal 60.
6 and 10 get to 60 when multiplied. Let's see  if it fits in as a perimeter.
12+20=32
So the width and length of the room is 6 meters and 10 meters.
5 0
3 years ago
Jenny bought scrapbooking supplies for $156.50. She paid $10.17 in sales tax. What was the sales tax rate on the supplies? If ne
Lapatulllka [165]

Answer:

6.5%

Step-by-step explanation:

sales price x sales tax rate = sales tax

156.50 x sales tax rate = 10.17

sales tax rate = 10.17/156.50

sales tax rate = .065 or 6.5%

7 0
3 years ago
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