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3 years ago

Please help! Q and R are mutually exclusive events. If P(Q)=0.1 and P(R)=0.45, find P(Q or R).

Mathematics

2 answers:

Natasha2012 [34]3 years ago

7 0

0.45 x 0.1 = 0.045 is the correct answer. Hope I helped.

Scilla [17]3 years ago

4 0

I want to say that it is A) 0.550

I'm pretty sure that you only multiply when it says and, as in P(Q and R).
P(Q or R) means that you add the two probabilities.

0.1 + 0.45 = 0.550

Correct me if I am wrong though. I was never very good with probability.

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In a particular course, it was determined that only 70% of the students attend class on Fridays. From past data it was noted tha

siniylev [52]

Answer: Probability that students who did not attend the class on Fridays given that they passed the course is 0.043.

Step-by-step explanation:

Since we have given that

Probability that students attend class on Fridays = 70% = 0.7

Probability that who went to class on Fridays would pass the course = 95% = 0.95

Probability that who did not go to class on Fridays would passed the course = 10% = 0.10

Let A be the event students passed the course.

Let E be the event that students attend the class on Fridays.

Let F be the event that students who did not attend the class on Fridays.

Here, P(E) = 0.70 and P(F) = 1-0.70 = 0.30

P(A|E) = 0.95, P(A|F) = 0.10

We need to find the probability that they did not attend on Fridays.

We would use "Bayes theorem":

$P(F\mid A)=\dfrac{P(F).P(A\mid F)}{P(E).P(A\mid E)+P(F).P(A\mid F)}\\\\P(F\mid A)=\dfrac{0.30\times 0.10}{0.70\times 0.95+0.30\times 0.10}\\\\P(F\mid A)=\dfrac{0.03}{0.695}=0.043$

Hence, probability that students who did not attend the class on Fridays given that they passed the course is 0.043.

8 0

3 years ago

THOROUGHLY EXPLAIN how this is done plz

prisoha [69]

First and last terms of the given equation are perfect squares. They can be written as

(4p^2)^2+ 2.(4p^2).5+(5)^2
It's like identity 1: (a+b)^2=a^2+2ab+b^2
So a=4p^2 and b=5
Therefore it is equal to (4p^2+5)^2

8 0

4 years ago

Find the midpoint between (-6, 8) and (4, 6)<br> Midpoint is _____ ______

seropon [69]

Answer:

(-1,7) is the midpoint of these two points

Step-by-step explanation:

4 0

3 years ago

How to solvee ????? PPLLEASEEEEE

Kipish [7]

If they are all in a line then we can find the equation of their line using: y = mx + b

First find m using points (2,5) and (3,3)

m = (5-3)/(2-3) = 2/-1 = -2

Now using (3,3) and m= -2 to solve for b:

3 = -2(3) + b
3 = -6 + b
9 = b

So our equation is y = -2x + 9
That is the solution for question b)

Now to find the mystery point, solve:

1 = -2x + 9
-8 = -2x
4 = x

So our mystery point is (4,1)

So for part a) the answer is k = 4

5 0

3 years ago

Read 2 more answers

Are the equations m 3 = −5 and m = −2 equivalent? explain.

lara [203]

M = {-0.5, 0.5}that is the plot

8 0

3 years ago