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DanielleElmas
3 months ago
5

Suppose that a person's birthday is a uniformly random choice from the 365 days of a year (leap years are ignored), and one pers

on's birthday is independent of the birthdays of other people. alex, betty and conlin are comparing birthdays. define these three events: a = {alex and betty have the same birthday} b = {betty and conlin have the same birthday} c = {conlin and alex have the same birthday} are these events independent ?
Mathematics
1 answer:
Inessa [12.5K]3 months ago
3 0
P ( A ∩ B ∩ C) = 1/365
P(A) = 1/365, P(B)= 1/365, P(C) = 365
For events A, B, and C to be independent, the equation P (A ∩ B ∩ C) = P (A) P(B) P(C) must hold true,
However, from the given probabilities,
1/365≠ 1/365 * 1/365 * 1/365
Therefore, it follows that events A, B, and C are not independent.

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Find the values for k so that the intersection of x = 2k and 3x + 2y = 12 lies in the first quadrant.
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Answer:

0 < k < 2

Step-by-step explanation:

In the first quadrant, both x and y are positive, thus

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Substituting x with 2k into the second equation gives:

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Given that y > 0:

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By combining k > 0 and k < 2, we obtain:

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A customer at a store paid $64 for 3 large candles and 4 small candles. At the same store, a second customer paid $4 more than t
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The equations to determine the price in dollars for each large candle, x, and small candle, y are x+8y=68 and 3x+4y=64.

Detailed explanation:

In this scenario, a customer bought 3 large candles and 4 small candles for a total of $64. Another customer paid $4 more for 1 large candle and 8 small candles at the same store. The prices of large and small candles remain constant. To identify the equations for determining the price in dollars of each large candle (x) and small candle (y), we can see the following:

Let the price of each large candle be x and each small candle be y. Thus,

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This results in the equation:

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The second customer at the store paid $4 more than the previous customer for 1 large candle and 8 small candles.

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Therefore, the equations to calculate the price in dollars for each large candle, x, and small candle, y are x+8y=68 and 3x+4y=64.

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