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Annette [7]
3 years ago
13

1. Determine whether or not each of the following is a Binomial random variable. If it is not a Binomial random variable, provid

e a short explanation. a) You roll a die 25 times. Let X be the number of times that you roll "3". b) The SJSU football team will play 12 games next season. They have a 70% chance of winning each conference game and a 60% chance of winning each nonconference game. Let X be the number of games the SJSU football team wins next season. c) Evelyn has a 75% chance of getting an A in each class she takes. Let X be the number of times Evelyn earns an A during four years at SJSU.
Mathematics
1 answer:
satela [25.4K]3 years ago
8 0

Answer:

a) You roll a die 25 times. Let X be the number of times that you roll "3".

* Is a Binomial

b) The SJSU football team will play 12 games next season. They have a 70% chance of winning each conference game and a 60% chance of winning each nonconference game. Let X be the number of games the SJSU football team wins next season.

* Not a Binomial because probability of success is not constant

c) Evelyn has a 75% chance of getting an A in each class she takes. Let X be the number of times Evelyn earns an A during four years at SJSU.

* Is a Binomial

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The answer to = 2x27 is f(x)
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3 years ago
A couple needs $55,000 as a down payment for a home. If they invest the $40,000 they have at 4% compounded quarterly, how long w
slava [35]

Answer:

8 years

Step-by-step explanation:

Compound interest formula

A(t)= A_0(1+\frac{r}{n})^{nt}

A(t) is the final amount 55000

A_0= 40000, r= 4% = 0.04, for quarterly n=4

55000=40000(1+\frac{0.04}{4})^{4t}

divide both sides by 40000

1375=(1+\frac{0.04}{4})^{4t}

1375=(1.01)^{4t}

Take ln on both sides

ln(1375)=4tln(1.01)

divide both sides by ln(1.01)

\frac{ln 1375}{ln 1.01}=4t

Divide both sides by 4

t=8.00108

So it takes 8 years

8 0
3 years ago
Can anyone help please
skelet666 [1.2K]

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8 0
3 years ago
3 adult tickets and 1 child ticket to a play cost $38. 3 adult and 3 children tickets cost $52. what does each ticket cost?
babymother [125]
A= adult
C= child

3A+C = 38.3
A+3C = 52

There is no logical way to find the value of each other than guess-and-check.

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3 years ago
Find the contrapositive for the following statement if you are in college, then you graduated from high school
Colt1911 [192]

Answer:

If <u><em>you didn't graduate from High school</em></u> ,Then <u><em>you are not in college</em></u>

Step-by-step explanation:

<u><em>statement</em></u> :

if <u><em>you are in college</em></u>, then <u><em>you graduated from high school</em></u>

In the given statement we have :

The Hypothesis is : <u><em>you are in college</em></u>

The conclusion is : <u><em>you graduated from high school</em></u>

in order to get the contrapositive ,

• first we switch the hypothesis and the conclusion

( H ⇒ C becomes C ⇒ H )

• Second, we negate the hypothesis and the conclusion.

Then

• first ,if <u><em>you graduated from high school </em></u>, then<u><em> you are in college</em></u>

• second , If <u><em>you didn't graduate from High school</em></u> ,Then <u><em>you are not in college</em></u>

4 0
1 year ago
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