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โจทย์ ปรนัย
P(AUBc)-(1-P(AUB)) =0.9-0.3 =0.6
Probability Theory Set
-.50 -.25 +.25 เต็ม 0 -35% +30% +35%
P(E) + P(Ec(intersect)Fc) =5/6
0.3 - 0.2 = 0.1 0.6 - 0.2 = 0.4 0.1 + 0.4 = 0.5
5/25 =1/5
Probability Theory
Combination Formula
Probability Theory Permutation
only 1/3 of positive integers is even
x/2x * x-1/2x-1 * x-2/2x-2 = 1/12 x=5 2x=10
4/60=1/15
1/5 * 100 = 20%=0.2