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iVinArrow [24]
3 years ago
15

A fish and game worker catches, tags, and releases 120 trout in a lake. Later, she catches 84 trout and finds tags on 30 of them

. Estimate the number of trout in the lake.
A. 43
B. 234
C. 336
D. 3600
Mathematics
1 answer:
goldenfox [79]3 years ago
5 0
The final answer is B because you just add all three together. Hope you get it!
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You are working in a primary care office. Flu season is starting. For the sake of public health, it is critical to diagnose peop
Aleksandr-060686 [28]

Answer:

E. 0.11

Step-by-step explanation:

We have these following probabilities:

A 10% probability that a person has the flu.

A 90% probability that a person does not have the flu, just a cold.

If a person has the flu, a 99% probability of having a runny nose.

If a person just has a cold, a 90% probability of having a runny nose.

This can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

P = \frac{P(B).P(A/B)}{P(A)}

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

In this problem, we have that:

What is the probability that a person has the flu, given that she has a runny nose?

P(B) is the probability that a person has the flu. So P(B) = 0.1.

P(A/B) is the probability that a person has a runny nose, given that she has the flu. So P(A/B) = 0.99.

P(A) is the probability that a person has a runny nose. It is 0.99 of 0.1 and 0.90 of 0.90. So

P(A) = 0.99*0.1 + 0.9*0.9 = 0.909

What is the probability that this person has the flu?

P = \frac{P(B).P(A/B)}{P(A)} = \frac{0.1*0.99}{0.909} = 0.1089 = 0.11

The correct answer is:

E. 0.11

5 0
3 years ago
Please help me with steps ​
Kitty [74]

Answer:

12 if x_y

Step-by-step explanation:

12= 3x4 (I'm sorry for this, I need points)

8 0
3 years ago
1 pound of apples for $2.15 or 3 pounds of apples for $5.76
ollegr [7]

Answer:$7.91


Step-by-step explanation:add 2.15+5.76=7.91


7 0
3 years ago
Is the answer I choose right and if not please tell me what it is Nd Please tell me how to show the work also !
romanna [79]

Answer:

yes

Step-by-step explanation:

6 0
3 years ago
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Simplify this expression<br> 45p - 9p + 8
beks73 [17]

Answer:

45p-9p+8 simplified is 36p+8

3 0
3 years ago
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