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FrozenT [24]
3 years ago
15

How to solve questions

Mathematics
1 answer:
zhuklara [117]3 years ago
7 0
Too shaky, cant read
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A group of men and women were asked what their favorite pet was, and the results of the survey were tabulated.Petey is consideri
malfutka [58]
You question is of two parts.
For the first part:
<span>A group of men and women were asked what their favorite pet was, and the results of the survey were tabulated.

\begin{center}&#10;\begin{tabular}&#10;{|c|c|c|c|c|}&#10; & Cats & Dogs & Other & Total \\ [1ex]&#10;Male & 42 & 58 & 6 & 106 \\&#10;Female & 52 & 48 & 2 & 102 \\ [1ex]&#10;Total & 94 & 106 & 8 & 208&#10;\end{tabular}&#10;\end{center}

</span>Let event A be defined as randomly choosing someone who picked cats or dogs as their favorite pet. Let event B be defined as a randomly chosen person being male.
Find P(B| NOT A).

P(A) = P(choosing cat) + P(choosing dog) = \frac{94}{208} + \frac{106}{208} = \frac{200}{208} = \frac{25}{26}
P(NOT A) = 1- \frac{25}{26} = \frac{1}{26}
P(B and NOT A) = P(males that did not choose cat or dog) = \frac{6}{208} = \frac{3}{104}

P(B | NOT A) = \frac{P(B \, and \, NOT \, A)}{P(NOT \, A)} = \frac{ \frac{3}{104} }{ \frac{1}{26} } =\frac{3}{104}\times26= \frac{3}{4}


For the second part of the question.
<span>Petey is considering investing $19 in a certain company. Financial advisors forecast that there is a 30% chance that the stock will increase in value by 10%, and a 70% chance he will lose his initial investment. Determine if Petey should make the investment, and find the expected value of the investment.

If his investment increases by 10%, the value of the investment will be 1.1 x $19 = $20.90 with a probability of 30% or 0.3

The expected value of the investment is given by
\$20.90\times0.3+(-\$19\times0.7)=\$6.27-\$13.30=-\$7.03

Therefore, Petey should not make the investment as there is an expectation of a loss from the investment.
</span>
7 0
3 years ago
What is the approximate value of square root 7 to the nearest tenth? helppppp PLEASEE!!
vlada-n [284]

Square root 7 to the nearest tenth is 2.60

Step-by-step explanation:

To find square root of 7, you write;

√7=2.645

To the nearest tenth you check the hundredth value which is 4

√7=2.645 = 2.60

Learn More

To find square root : brainly.com/question/3617398

Keyword : square root

#LearnwithBrainly

5 0
3 years ago
What factors do 15 and 18 have in common
Alexandra [31]
The factor is three. One also but that is true for any two numbers. 
3 0
4 years ago
Read 2 more answers
A jar contains 125 marbles. Given 2% of the marbles are green, 54% of the marbles are blue, and the rest are red, how many red m
kupik [55]

there are 55 red marbles in the jar

5 0
3 years ago
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Find the volume of the following figure. 9 cubic units 48 cubic units 24 cubic units 8 cubic units
Rom4ik [11]
<span>In mathematics, the amount of space occupied by an object measured in three dimensions, expressed in cubic units is called the volume. Without the figure for this question, we cannot be certain on what is the total volume. You should just count the number of cubes formed in the figure. Hope this helps.</span>
8 0
4 years ago
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