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2 years ago

PLEASE HELP, GIVING BRAINLIEST, PLEASE EXPLAIN ANSWER, 20 points, make sure answers is right

Mathematics

2 answers:

WINSTONCH [101]2 years ago

6 0

The top is correct I checked

valentinak56 [21]2 years ago

4 0

Answer:

1 = 245

2 = 54

3 = 168

4 = 288

Step-by-step explanation:

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It is known that 10% of the items produced by a certain machine end up having a flaw. If we select 7 items from the production l

denpristay [2]

Step-by-step explanation:

p = 0.1, q = 0.9, n = 7

a) Use complementary probability.

P(at least 1) = 1 − P(0)

P(at least 1) = 1 − (0.9)⁷

P(at least 1) = 0.522

b) Use binomial probability.

P = nCr pʳ qⁿ⁻ʳ

P(3) = ₇C₃ (0.1)³ (0.9)⁴

P(3) = 0.023

6 0

3 years ago

Suppose on a certain planet that a rare substance known as Raritanium can be found in some of the rocks. A raritanium-detector i

aleksandrvk [35]

Answer:

0.967 = 96.7% probability the rock sample actually contains raritanium

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Positive reading

Event B: Contains raritanium

Probability of a positive reading:

98% of 13%(positive when there is raritanium).

0.5% of 100-13 = 87%(false positive, positive when there is no raritanium). So

$P(A) = 0.98*0.13 + 0.005*0.87 = 0.13175$

Positive when there is raritanium:

98% of 13%

$P(A) = 0.98*0.13 = 0.1274$

What is the probability the rock sample actually contains raritanium?

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.1274}{0.13175} = 0.967$

0.967 = 96.7% probability the rock sample actually contains raritanium

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2 years ago

The population of people in a town increases by 100 each year which equation represents the situation let p represent the amount

Virty [35]

Answer: p=100t

Step-by-step explanation:

I just took the self assessment for JMHS & this was the correct answer

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3 years ago

Find the value of from the following right triangle.<br><br>plzzz help i will mark you as brainliest

NikAS [45]

Answer:

Step-by-step explanation:

by Pythagoras theorem,

P²+B² =H²

5²+B²=13²

B²= 13²-5²

B²= 169-25

B²= 144

B=√144

B= 12

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3 years ago

Chuck runs laps around a track. The table shows how long it takes him to run different numbers of laps. How long would it take C

Vika [28.1K]

It would take him 25 minutes to run 5 laps

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2 years ago

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