4 years ago

If you help me get this right i will give you brainly, and 5 stars!..

Mathematics

1 answer:

Liula [17]4 years ago

3 0

Answer:

C) Mapping

Step-by-step explanation:

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a student either knows the answer or guesses. Let 3434 be the probability that he knows the answer and 1414 be the probability t

Arlecino [84]

Answer: $\dfrac{12}{13}$

Step-by-step explanation:

Let A = he known the answer then A' = he guess the answer.

B = he answered it correctly

As per given , we have

$P(A)=\dfrac{3}{4}\ \ ,\ \ P(A')=\dfrac{1}{4}$

$P(B|A)=1$

$P(B|A')=\dfrac{1}{4}$

By Bayes theorem , we have

$P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(B|A')P(A')}\\\\ P(A|B)=\dfrac{1\times\dfrac{3}{4}}{1\times\dfrac{3}{4}+\dfrac{1}{4}\times\dfrac{1}{4}}\\\\= \dfrac{12}{13}$

The probability that the student knows the answer given that he answered it correctly is $\dfrac{12}{13}$ .

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3 years ago

A school requires students wear uniforms. They can choose from the following options. How many total choices does a student have

Svet_ta [14]

Answer:

The answer is 16

Step-by-step explanation:

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3 years ago

A telemarketer earns $150 a week plus $2 for each call that results in sale. Last week she earned a total of $204. How many of h

cluponka [151]

Answer:

27 calls

Step-by-step explanation:

Let T(x) represent total sales.

Then T(x) = $150 + ($2/call)x, where x is the number of calls made.

If T(x) = $204, we can solve for x, the number of calls made:

$204 = $150 + ($2/call)x, or

$ 54

----------- = 27 calls

$2/call

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3 years ago

the pearl restaurant put a larger aquarium in its lobby. the base is 6 ft by 3 ft and the height is 4 ft how many more cubic fee

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Well 6×12=72. I don't know what the original tank size was but subtract the original from this one to get your answer.

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4 years ago

Complete the ratio- I WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST!<br><br> 8:44=1::?

miskamm [114]

Answer:

8 /8 =1

44/8=5,5

so the ratio is 1:5,5

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2 years ago