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3 years ago

A bag contains 12 green marbles and 9 white marbles. In simplest form, what are the odds in favor of drawing a white marble?

Mathematics

2 answers:

aksik [14]3 years ago

4 0

Total number of marbles: 12+9 = 21
Possibility of withdrwaing a white marble = 9/21 = 3/7 = 3:7

Ann [662]3 years ago

3 0

Well if you take the two numbers and divide them, 9/12 you get 3/4 i would probably say B. 3:4

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The test statistics is $t = -1.7$

The Null and Alternative hypothesis are

$H_o : \mu = 47.2$ and $H_a : \mu \ne 47.2$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 47.2 miles/gallon(MPG)$

The sample size is $n = 250 \ van$

The sample mean is $\= x = 47.0$

The sample standard deviation is $\sigma = 1.9$

The level of significance is $\alpha = 0.02$

Given that the value which the manufacturer gave the automobile is 47.2 and it is believed that this is not correct, then

The Null Hypothesis is

$H_o : \mu = 47.2$

The alternative Hypothesis is

$H_a : \mu \ne 47.2$

The test statistics can be mathematically evaluated as

$t = \frac{\= x- \mu}{\frac{\sigma }{\sqrt{n} } }$

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$t = \frac{\= 47- 47.2}{\frac{1.9 }{\sqrt{250} } }$

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