Probabilities are used to determine the chances of an event.
- The probability that the first contestant is a boy is 1/2
- The probability that the second contestant is a boy, if the first is a boy is 9/19
- The probabilities are not independent
The given parameters are:



<u>(a) Probability that first contestant is a boy</u>
This is calculated as:

This gives


<u>(b) Probability that the second contestant is a boy, if the first is a boy</u>
This is calculated as:

We subtracted 1, because the first contestant (a boy) is no longer part of the selection.
So, we have:


<u>(c) Independent probabilities</u>
The probabilities are not independent, because when a contestant is selected, the number of contestant is reduced by 1.
And this will affect the probability of the next selection.
Read more about probabilities at:
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The square of 18 is 9 because square = 2, so 18 ÷ 2 = 9. I hope this helps you.
Answer:
I cant answer it because you cant copy it it doesnt allow me
x³ + y³ + z³ - 3xyz is a multiple of x+y+z.
<h3>What is a multiple?</h3>
It should be noted that a multiple simply means a number that van be divided by another a certain number if times without a remainder.
Put x + y + z = 0
= x³ + y³ + z³ - 3xyx
= 0(x² + y² + z² - xt - yz - zx)
= x³ + y³ + z³ - 3xyz = 0.
x³ + y³ + z³ = 3xyz
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Answer:
1/3 pound per person
Step-by-step explanation:
(All) (People) (Amount per person)
1.32 / 4 = .33
.33 = 1/3