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3 years ago

7

A bag contains 3 white balls, 4 green balls. 2 balls are drawn from the bag without replacement. Use a tree diagram to find the

probability that the balls are white colors
5/42
3/7
5/13
6/42

2 answers:

Margaret [11]3 years ago

8 0

3/7 is the answer hope this helps!

Kamila [148]3 years ago

5 0

It’s 3/7 :) have a nice day

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3 years ago

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 122 feet. A transportat

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Complete Question

The complete question is shown on the first uploaded image

Answer:

the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

The test statistics is $t = - 1.761$

The p-value is $p = P(Z < t ) = 0.039119$

so

$p \ge 0.01$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 122$

The sample size is n= 38

The sample mean is $\= x = 116 \ feet$

The standard deviation is $\sigma = 21$

Generally the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

Generally the test statistics is mathematically evaluated as

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

substituting values

$t = \frac { 116 - 122 }{\frac{ 21 }{ \sqrt{ 38} } }$

$t = - 1.761$

The p-value is mathematically represented as

$p = P(Z < t )$

From the z- table

$p = P(Z < t ) = 0.039119$

So

$p \ge 0.01$

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3 years ago

Write 5 wholes and 9 ; 25 fifths as an improper fraction.

alina1380 [7]

Answer:

134/25

Step-by-step explanation:

5 9/25 > 5 * 25 = 125 + 9 = 134. > 134/25

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3 years ago