What's the standard form of eight three million, twenty three thousand,seven

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

satela [25.4K]

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

8 0

4 years ago

If A and B are independent events with P(A) = .5 and P(B) = .2, find the following:a) P(A U B)b) P(A^c ? B^c)c) P(A^c U B^c)**No

Effectus [21]

If A and B are independent, then $P(A\cap B)=P(A)P(B)$ .

a.

$P(A\cup B)=P(A)+P(B)-P(A\cap B)=P(A)+P(B)-P(A)P(B)$

$P(A\cup B)=0.5+0.2-0.5\cdot0.2$

$\boxed{P(A\cup B)=0.6}$

b. I'm guessing the ? is supposed to stand for intersection. We can use DeMorgan's law for complements here:

$P(A^c\cap B^c)=P(A\cup B)^c=1-P(A\cup B)$

$P(A^c\cap B^c)=1-0.6$

$\boxed{P(A^c\cap B^c)=0.4}$

c. DeMorgan's law can be used here too:

$P(A^c\cup B^c)=P(A\cap B)^c=1-P(A\cap B)=1-P(A)P(B)$

$P(A^c\cup B^c)=1-0.5\cdot0.2$

$\boxed{P(A^c\cup B^c)=0.9}$

4 0

3 years ago

If Robert was on a train and he ate 7 apples in 20 minutes, and the train takes 2 hours to get Florida how many apples will he h

Fittoniya [83]

Answer: first multiply then determine if you should add or subtract.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Elmo was chagrined to find that the ratio of dandelions to peonies in the garden was 11 to 4. If there were 36 peonies in the ga

sergiy2304 [10]

Answer:

99 dandelions

Step-by-step explanation:

Given: ratio of dandelions to peonies in the garden was 11 to 4

Total number of peonies in the garden = 36

To find: Total number of dandelions in the garden

Solution:

A ratio indicates number of times one quantity contains another quantity.

$\frac{Number\,\,of\,\,dandelions }{Number\,\,of\,\,peonies} =\frac{11}{4}\\\\\frac{Number\,\,of\,\,dandelions}{36} =\frac{11}{4}\\ Number\,\,of\,\,dandelions=(\frac{11}{4}) (36)=99$

So,

99 dandelions were there in the garden.

4 0

3 years ago

write the equation In point slope form of the line with slope 2/5 and passing through the point (-8,1)

Dominik [7]

Point-slope:

y-y1= m(x-x1)

Plug in what you know.

y1= 1 and x1= -8

y-1= 2/5(x-(-8)
y-1= 2/5(x+8)

Distribute.

y-1=.4x+ 3.2 <- that is the final answer

I hope this helps!
~kaikers

5 0

3 years ago