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anastassius [24]
3 years ago
13

There are 35 men and 25 women on a bus. If 20 married couples leave the bus, the number of men is how many times the number of w

omen?​
Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
6 0

Answer:

3

Step-by-step explanation:

15 men would be left

5 women would be left

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<span>Solve the system

9x = 27-9y
20x=71-9y

Let's use the "elimination through addition/subtraction method.
Multiply the first equation by -1 so as to obtain +9y:

-9x = -27 + 9y
</span><span>20x=  71-   9y
--------------------

Add these 2 equations together:

</span>-9x = -27 + 9y
20x=  71-   9y
--------------------
<span> 11x = 44

Solve this for x:  x = 44/11 = 4.

Now find y by subst. 4 for x in either of the original equations.

Using the second equation:    </span><span> 

</span>20x=71-9y
20(4) = 71 - 9y
80-71 = -9y
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TiliK225 [7]

Two eventis are independent if knowledge about the first doesn't change your expectation about the second.

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b) Independent: It's just the same as before. After you know that the first coin landed on heads, you still expect the second coin to land on heads or tails with probability 1/2 each. Knowledge about the first coin changed nothing about your expectation about the second coin.

a) Dependent: In this case, there is a cause-effect relation, so the events are dependent: knowing that a person is short-sighted makes you almost sure that he/she will wear glasses. So, knowledge about being short sighted changed your expectation about wearing glasses.

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Step-by-step explanation:

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Step-by-step explanation:

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