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Find the missing value required to create a probability distribution, then find the standard deviation for...

Find the missing value required to create a probability distribution, then find the standard deviation for the given probability distribution. Round to the nearest hundredth.

x / P(x)
////////
0 / 0.14
1 / 
2 / 0.18
3 / 0
4 / 0.09
Math   Statistics-And-Probability   
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