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iVinArrow [24]
2 years ago
9

Ten boys and twelve girls decide to rent a 16-passenger van and a 6-passenger to drive to a rock concert in a near by city. If t

he group is distributed between the vehicles, whats the probability that
a) there are no boys in the car
b) steve and susan are both in the van
c) either steven or susan are in the van
d) there are no girls in the car
Mathematics
1 answer:
stira [4]2 years ago
5 0
A) The probability that there are no boys in the car is given by:
P(no\ boys\ in\ car)=\frac{12C6}{22C6}=0.012
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Pete is a politician. He claims that 32% of the households in his district have total household incomes below the poverty level.
victus00 [196]

Answer:

z=\frac{0.3867 -0.32}{\sqrt{\frac{0.32(1-0.32)}{225}}}=2.145  

For a bilateral test the p value would be:  

p_v =2*P(z>2.145)=0.0320  

Step-by-step explanation:

Information given

n=225 represent the sample selected

X=87 represent the households with incomes below the poverty level

\hat p=\frac{87}{225}=0.3867 estimated proportion of households with incomes below the poverty level

p_o=0.32 is the value that we want to test

z would represent the statistic

p_v represent the p value

System of hypothesis

We want to check if the true proportion is equal to 0.32 or not.:  

Null hypothesis:p=0.32  

Alternative hypothesis:p \neq 0.32  

The statistic is given bY:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing we got:

z=\frac{0.3867 -0.32}{\sqrt{\frac{0.32(1-0.32)}{225}}}=2.145  

For a bilateral test the p value would be:  

p_v =2*P(z>2.145)=0.0320  

4 0
3 years ago
The area of a rectangle is 490490 in squaredin2. the ratio of the length to the width is 5 : 25:2. find the length and the width
Arlecino [84]
Let the width be 2w. Then the lenght is 5w. So:
(2w)(5w)=490
10w²=490
w²=49
w=±7
So, 2w=width=14 in; and 5w=length=35 in
☺☺☺☺
6 0
3 years ago
................................................................................................................................
Alborosie

Answer:

its 65. bcuz you add it all together

Step-by-step explanation:

6 0
3 years ago
What comes after this:
Lynna [10]

Answer:

16:20??

Lol I think it's wrong sorry.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
How is 340 divided by 17 reasonable
vivado [14]
17 goes into 34 two times

and goes into 0 zero times

So 340 / 17 = 20
8 0
2 years ago
Read 2 more answers
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