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The pitcher has 3 red balls and 2 white balls. Dani randomly selects (without looking) two...

The pitcher has 3 red balls and 2 white balls.
Dani randomly selects (without looking) two balls without return. Define:
X = The number of red balls Dani chose.
What is the standard deviation of X?
A. 0.28
B. 0.6
C. 1.34
D. 1.8

?

Math   Statistics-And-Probability   
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