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madreJ [45]
3 years ago
13

- Evaluate the expression y - (Z - w) for y = -5,2 = 5 and w = -2

Mathematics
1 answer:
timurjin [86]3 years ago
6 0

Answer: The correct answer is - 12

Step-by-step explanation:

y = -5, z = 5 and w = -2

Inputing the various terms

-5 - (5 - (-2))

Resolving using BODMAS

= - 5 - (5+2)

= -5 - 7

= -12

Hope this helps

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Given:

Number of red marbles = 4

Number of blue marbles = 8

Number of yellow marbles = 6

Number of green marbles = 2

To find:

The probability of getting a blue marble then a red marble, i.e., P(blue, red).

Solution:

Using the given information,

The total number of marbles = 4+8+6+2

                                                = 20

Probability of getting a blue marble in first draw is

P(Blue)=\dfrac{\text{Number of blue marbles}}{\text{Total number of marbles}}

P(Blue)=\dfrac{8}{20}

P(Blue)=\dfrac{2}{5}

Maria selects a marble, puts it back and then selects a second marble. It means the total number of marbles remains the same.

P(red)=\dfrac{\text{Number of red marbles}}{\text{Total number of marbles}}

P(red)=\dfrac{4}{20}

P(red)=\dfrac{1}{5}

Now, the probability of getting a blue marble then a red marble is

P(blue,red)=\dfrac{2}{5}\times \dfrac{1}{5}

P(blue,red)=\dfrac{2}{25}

Therefore, the required probability P(blue, red) is \dfrac{2}{25}.

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3 years ago
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