3 years ago

What is 8b-ab+7a subtracted from 3a-9ab+b

Mathematics

1 answer:

Ainat [17]3 years ago

6 0

Answer:

You should get -5

Step-by-step explanation:

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Sam's closet contains blue and green shirts. He has eight blue shirts, and seven green shirts. Five of the blue shirts have stri

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Answer: The answer is 80%.

Step-by-step explanation: Let us define the following events.

B = the event that the shirt is blue,

G = the event that the shirt is green

and

S = the event that the shirt is striped.

So, n(B) = 8, n(G) = 7, n(B and S) = 5, n(G and S) = 4.

n(S) = 5 + 4 = 9.

We have

$n(B\cup S)=n(B)+n(S)-n(B\cap S)=8+9-5=12.$

Therefore, the required probability is

$p=\dfrac{n(B\cup S)}{8+7}=\dfrac{12}{15}=\dfrac{4}{5}=0.8=80\%.$

Thus, the answer is 80%.

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