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Igoryamba
3 years ago
14

Assume that a procedure yields a geometric distribution where the probability of success is 63%. Use the geometric probability f

ormula to find the probability that the first success occurs after the sixth trial.
0.003
0.014
0.055
0.125
Mathematics
1 answer:
tigry1 [53]3 years ago
4 0

Answer:

Option A - 0.003

Step-by-step explanation:

Given: Probability of success = 63%= 0.63  

Probability of failure = 1-0.63=0.37

To find: Probability that the first success occurs after the sixth trial

Formula for calculating geometric probabilities:  

If P(X >n)  or the probability that it takes more than a certain number of trials to achieve the first success.

P(X>n)=(1-p)^n

where, X has a geometric distribution,p is the probability of success and (1-p) is the failure and possible values of X are 1, 2, 3, ....  

Now, put values p=0.63, (1-p)= 0.37 , n=6 in the formula  

P(X>n)=(1-p)^n

P(X>6)=(0.37)^6

P(X>6)=0.0025  

P(X>6)=0.003  

Therefore, Option A is correct


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40 points plz help if u can Which function has no Zeroes? Select all that apply.
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<h3>2 Answers: Choice C and choice D</h3>

y = csc(x) and y = sec(x)

==========================================================

Explanation:

The term "zeroes" in this case is the same as "roots" and "x intercepts". Any root is of the form (k, 0), where k is some real number. A root always occurs when y = 0.

Use GeoGebra, Desmos, or any graphing tool you prefer. If you graphed y = cos(x), you'll see that the curve crosses the x axis infinitely many times. Therefore, it has infinitely many roots. We can cross choice A off the list.

The same applies to...

  • y = cot(x)
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So we can rule out choices B, E and F.

Only choice C and D have graphs that do not have any x intercepts at all.

------------

If you're curious why csc doesn't have any roots, consider the fact that

csc(x) = 1/sin(x)

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