2 years ago

A bag contains 15 blue chips and 10 red chips. if one chip is drawn at random, what is the probability that it will be red?

1 answer:

5 0

Answer: I’m pretty sure it’s c hope this helps

Step-by-step explanation:

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Llana [10]

Answer:

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sergeinik [125]

Answer:

Option c

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tigry1 [53]

Answer:

C) $-\frac{47}{49}$

Step-by-step explanation:

By the cos double angle formula, we know $\cos(2\theta)=2\cos^2\theta-1.$ Substituting $\cos \theta$ into the formula, we get

$\cos(2\theta)=2(-\frac{1}{7})^2-1\\~~~~~~~~~~=\frac{2}{49}-1\\~~~~~~~~~~=\boxed{-\frac{47}{49}}$ .

The answer is C.

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