These questions concerns the following situation.  There is a rain on a football ground.  The ground is 100 meters long and 70 meters wide.  Model the event of a raindrop falling as a randomly selected point in the rectangle pictured.Lets imagine the following random variables:  X is the x-coordinate where a raindrop falls, Y is the y-coordinate of where a raindrop falls, and Z=X+Y.

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These questions concerns the following situation.  There is a rain on a football ground.  The ground is 100 meters long and 70 meters wide.  Model the event of a raindrop falling as a randomly selected point in the rectangle pictured.Lets imagine the following random variables:  X is the x-coordinate where a raindrop falls, Y is the y-coordinate of where a raindrop falls, and Z=X+Y.

CHOOSE ONE AND SHOW THE PROCESS.

Which one of the following statements are true? *

a) X and Y are independent

b) X and Z are independent

c) Y and Z are independent

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