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3 years ago

HELLLP JUST GIVE THE ANSWER

Mathematics

2 answers:

Gnoma [55]3 years ago

8 0

I think it may be -1

Free_Kalibri [48]3 years ago

4 0

Answer:

I think the answer to your question is -1

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Christine Wong has asked Dave and Mike to help her move into a new apartment on Sunday morning. She has asked them both in case

olga nikolaevna [1]

Answer:

(a) The probability that both Dave and Mike will show up is 0.25.

(b) The probability that at least one of them will show up is 0.75.

Step-by-step explanation:

Denote the events as follows:

<em>D</em> = Dave will show up.

<em>M</em> = Mike will show up.

Given:

$P(D^{c})=0.55\\P(M^{c})=0.45$

It is provided that the events of Dave of Mike showing up are independent of each other.

(a)

Compute the probability that both Dave and Mike will show up as follows:

$P(D\cap M)=P(D)\times P (M)\\=[1-P(D^{c})]\times [1-P(M^{c})]\\=[1-0.55]\times[1-0.45]\\=0.2475\\\approx0.25$

Thus, the probability that both Dave and Mike will show up is 0.25.

(b)

Compute the probability that at least one of them will show up as follows:

P (At least one of them will show up) = 1 - P (Neither will show up)

$=1-P(D^{c}\cup M^{c})\\=P(D\cup M)\\=P(D)+P(M)-P(D\cap M)\\=[1-P(D^{c})]+[1-P(M^{c})]-P(D\cap M)\\=[1-0.55]+[1-0.45]-0.25\\=0.75$

Thus, the probability that at least one of them will show up is 0.75.

(c)

Compute the probability that neither Dave nor Mike will show up as follows:

$P(D^{c}\cup M^{c})=1-P(D\cup M)\\=1-P(D)-P(M)+P(D\cap M)\\=1-[1-P(D^{c})]-[1-P(M^{c})]+P(D\cap M)\\=1-[1-0.55]-[1-0.45]+0.25\\=0.25$

Thus, the probability that neither Dave nor Mike will show up is 0.25.

6 0

3 years ago

Read 2 more answers

The scale on a map shows that 1 inch = 30 miles. If there are 4.5 inches between your present location and the place you want to

anastassius [24]

Scale : 1 inch = 30 miles

So, the ratio between the distance on the map and the real distance is 1:30

When a quantity increase/decrease in a ratio, the other one increase/decrease respectively.

Call the miles we have to go : x

1:30 = 4.5:x

(1x4.5):(30x4.5) = 4.5 : x

4.5 : 135 = 4.5 : x

So, x = 135 => We have to go 135 miles to get to the place we want to go.

6 0

2 years ago

please help expert help please! giving 16 points please help! will mark brainliest! Please do question 3!!! love y’all!

likoan [24]

Answer:

12 meters i think but I may be wrong

5 0

2 years ago

Find the missing angle.

Alina [70]

Answer:

sorry bro just wanted the points but thanks have a great day

Step-by-step explanation:

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3 years ago

39xy 6xy2 3x2y3 What is the greatest common factor (GCF) of the monomials shown above?

MAXImum [283]

Answer:

2x^2 y^3

Step-by-step explanation:

so its 2x then squared by 2 then y and squared by 3 all together making 2x^2y^3

4 0

3 years ago