Question 841489
dice with four faces was rolled 
x     1     2    3    4 
f(x) 0.16 0.19 0.21 0.44 

What is the probability that at least a 3 is rolled? 
Ans: (x = 3 or 4) = P(x=3)+P(x=4) = 0.21+0.44 = 0.65
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Cheers,
Stan H.
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