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3 years ago

Who can help ? please

Mathematics

1 answer:

Bumek [7]3 years ago

6 0

Answer:

Step-by-step explanation:

The apple equals 7

the pear equals 13

and the pomegranate equal 6

7+6 = 13

7+7+7 = 21

7+6+13=26

6+6=12

How I came to this conclusion was starting with the problem with one variable.

3 apple =21

so 21/3 = 7

Now this is the tricky part.

7 + x = z but also, 7 + x + z =26

So I plugged 6 into x, and got 13 for z.

7 + 6 = 13, and also 7 + 6 + 13 = 26.

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4 years ago

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Answer:

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Step-by-step explanation:

Let A be the event that the test result is positive and B the event that the athlete uses Steroids. We are given the following

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From which we deduce that

$P(A^c|B) = 10%, P(B^c) = 95%$

a) We are asked for the probability $P(A^c\cap B)$ . REcall the conditional probability formula that, given two events C,D the conditional probability $P(C|D) = \frac{P(C\cap D)}{P(D)}$ . Then we have that

$P(A^c\cap B) = P(A^c|B)P(B) = 10\% \cdot 5\%=0.5\%$ .

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$P(A) = P(A|B)P(B)+P(A|B^c)P(B^c) = 90\%\cdot5\% + 2\% \cdot 95% = 6.4\%$

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$P(B^c|A^c) = \frac{P(A^c|B^c)P(B^c)}{P(A^c)}= \frac{P(A^c|B^c)P(B^c)}{1-P(A)}= \frac{(1-P(A|B^c))P(B^c)}{1-P(A)}=\frac{98\%\cdot 95\%}{1-6.4\%}= 99.47\%$

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4 years ago

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coldgirl [10]

Answer:

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Step-by-step explanation:

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