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Llana [10]
3 years ago
14

A single card is drawn from a 52 standard deck. Find the conditional probability that the card is a heart given that it's a jack

.?
Mathematics
1 answer:
MakcuM [25]3 years ago
7 0
You can use the formula for conditional probability as Puzzling did. However in this problem it is easier just to restrict yourself and enumerate the cases that are left. 

<span>There are 4 jacks. One of them is a heart. So the probability is 1/4. </span>

<span>If you want to look at what the formula for conditional probability does, it adjusts your probability by restricting the "universe". </span>

<span>P(heart and jack)/P(jack) </span>
<span>= (1/52)/(4/52) = 1/4</span>
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3 years ago
When 2x^2 - 20x + 49 = 19 is written in the form (x - p)^2 = q, what is the value of q? Show your work please.
Strike441 [17]
 = 2x^2 - 20x + 49 = 2(x^2 - 10x + 49/2) 

y= 2((x-5)^2 - 25 + 49/2) = 2((x-5)^2 - 1/2) = 2(x-5)^2 - 1 

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3 years ago
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Zolol [24]

10000 digits can be used for 4 digit A.T.M code.

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After selecting first digit, second digit can be selected in 10 ways that is 0 to 9 and same holds true for third and fourth digit.

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2 years ago
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LUCKY_DIMON [66]
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            y = 16/5x + 33/5
3 0
2 years ago
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