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โจทย์ ปรนัย
P(AUBc)-(1-P(AUB))=0.6
Probability theory Set theory
-.50 -.25 +.25 เต็ม 0 -35% +30% +35%
P(E)=1/2 P(Ec intersect Fc)=1/3 P(E)+P(Ec intersect Fc)=5/6
P(A)=10% P(B)=40% P(A)+P(B)=50%
5/25 -> 1/5
Probability Theory
2
Probability Theory Combination/Permutation
1/4+1/3+5/12=12/12
The number of even integer = 1/3
x/2x * x-1/2x-1 * x-2/2x-2 = 1/12 x = 5 2x = 10
Probability theory
4/5*4*3 = 4/60 = 1/15
nCr
1/5 * 1
nCr 35 10 25
Probability Theory Combination
nCr r = 3
nCr c = 5
Sampling