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MrRissso [65]
3 years ago
15

If two cards are drawn without replacement from a 52 card deck, find the probability that the second card drawn is red, given th

at the first card was a heart.
Mathematics
1 answer:
snow_lady [41]3 years ago
5 0

Answer:

The probability that the second card drawn is red, given that the first card was a heart is 0.1225

Step-by-step explanation:

Total cards in a deck = 52

Total red cards = 26

Heart cards = 13

Probability of getting red card =\frac{13}{52}

Total remaining card = 51

Remaining red cards = 25

Probability of getting red card in second draw without replacement = \frac{25}{51}

So, the probability that the second card drawn is red, given that the first card was a heart = \frac{13}{52} \times \frac{25}{51} =0.1225

Hence the probability that the second card drawn is red, given that the first card was a heart is 0.1225

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Lucy has two star systems left to visit on her voyage, but her ship is running low on fuel. The first system, KA-77, is 12001200
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Answer:

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Step-by-step explanation:

Please find the attachment.

Let x represent the distance between KA-7 and KA-11.

We have been given that the first system, KA-7, is 1200 light years away while the second system, KA-11, is 1700 light years away. Lucy sees an angle of 52 degrees between KA-7 and KA-11.

We can see from our attachment that Lucy, KA-7 and KA-11 forms a triangle and we will use law of cosines to solve for x.  

(AB)^2=(AC)^2+(BC)^2-2(AC)(BC)*cos (C)

Upon substituting our given values in above formula we will get,

x^2=1200^2+1700^2-2*1200*1700*cos (52^o)  

x^2=1440000+2890000-4080000*0.615661475

x^2=4330000-2511898.81933008

x^2=1818101.18066992

Let us take square root of both sides of our equation.

x=\sqrt{1818101.18066992}

x=1348.3698234\approx 1348

Therefore, KA-7 and KA-11 are approximately 1348 light years apart.

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What value should go in the empty box to complete the calculation for finding the product of 62.834 × 0.45?
Andreyy89

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