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Pie
2 years ago
11

Jenna got 12, or 3/5, of her answers on the test right. How many questions were on the test?

Mathematics
1 answer:
aniked [119]2 years ago
6 0

Answer:

20

Step-by-step explanation:

12 times 5/3 =60/3=20

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Answer:

0.3333 = 33.33% probability that this red ball is from box A.

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: Red ball

Event B: From box A.

Probability of a red ball:

3/10 = 0.3 of 1/2 = 0.5(box A)

6/10 = 0.6 of 1/2 = 0.5(box B). So

P(A) = 0.3*0.5 + 0.6*0.5 = 0.45

Probability of a red ball from box A:

0.3 of 0.5, so:

P(A \cap B) = 0.3*0.5 = 0.15

What is the probability that this red ball is from box A?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.15}{0.45} = 0.3333

0.3333 = 33.33% probability that this red ball is from box A.

8 0
3 years ago
An architect built a scale model of a sports stadium using a scale in which 2 inches represents 30 feet. The height of the sport
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The height of the model in inches would be 6. if you multiply 30 until it reaches 180 you will have 6.
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2 years ago
Last Year, a state university received 3,560 applications from boys. Of those applications, 35 Percent were from boys who lived
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Answer:

a)10%=3560/100=356

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b)10% of 40%=3560/4=890

100%890x10=8900(answer)

hope this helps


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Answer:

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Step-by-step explanation:

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