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:
brainly.com/question/11234923
Another name for Spherical Geometry is (a.) Euclidean. <span>A sphere is not an </span>Euclidean<span> essentially, but the laws of this</span><span> geometry are close estimations.</span>
.25*3=.75
.375*2=.75
.5*2=2.0
.625*2=1.25
.75*3=2.25
.875*2=1.75
1*2=2
1.25*2=2.5
1.5*2=3
1.5+2=3.5
1.25+2.25=3.5+3.5=7
3.5+1.75=5.25
5.25+4.5=9.75
9.75+3=12.75
answer = 12.75in^2
Answer:
12
Step-by-step explanation:
12 +30= 42
42+12=54