P(A) = banyak muncul A / banyak percobaan
banyak percobaan = penjumlahan dari banyak mata dadu yang muncul
= 6+8+10+x+12+9
= 45+x
a. banyak muncul mata dadu 4
P(A) = n(A) / n(S)
[tex]\frac{1}{10}=\frac{x}{45+x}\\ 45+x=10x\\ 45=9x\\5=x[/tex]
mata dadu 4 muncul sebanyak 5 kali.
b. peluang empirik muncul mata dadu < 5
P(B) = P(X<5) = P(1)+P(2)+P(3)+P(4)
diketahui: n(S) = 45+x = 45+5 = 50 kali percobaan
P(1) = 6/50 = 3/25
P(2) = 8/50 = 4/25
P(3) = 10/50 = 5/25
P(4) = 1/10
Maka,
[tex]P(B)=\frac{3}{25}+\frac{4}{25}+\frac{5}{25}+\frac{1}{10}\\\\[/tex]
[tex]P(B)=\frac{6+8+10+5}{50} \\P(B)=\frac{29}{50}[/tex]
c. peluang empirik muncul mata dadu 5 atau lebih
P(C) = P(5)+P(6)
P(5) = 12/50
P(6) = 9/50
[tex]P(C)=\frac{12}{50}+\frac{9}{50} \\\\P(C)=\frac{21}{50}[/tex]
d. penjumlahan P(B) dan P(C)
[tex]P(B)+P(C)=\frac{29}{50}+ \frac{21}{50}=\frac{50}{50}=1[/tex]
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P(A) = banyak muncul A / banyak percobaan
banyak percobaan = penjumlahan dari banyak mata dadu yang muncul
= 6+8+10+x+12+9
= 45+x
a. banyak muncul mata dadu 4
P(A) = n(A) / n(S)
[tex]\frac{1}{10}=\frac{x}{45+x}\\ 45+x=10x\\ 45=9x\\5=x[/tex]
mata dadu 4 muncul sebanyak 5 kali.
b. peluang empirik muncul mata dadu < 5
P(B) = P(X<5) = P(1)+P(2)+P(3)+P(4)
diketahui: n(S) = 45+x = 45+5 = 50 kali percobaan
P(1) = 6/50 = 3/25
P(2) = 8/50 = 4/25
P(3) = 10/50 = 5/25
P(4) = 1/10
Maka,
[tex]P(B)=\frac{3}{25}+\frac{4}{25}+\frac{5}{25}+\frac{1}{10}\\\\[/tex]
[tex]P(B)=\frac{6+8+10+5}{50} \\P(B)=\frac{29}{50}[/tex]
c. peluang empirik muncul mata dadu 5 atau lebih
P(C) = P(5)+P(6)
P(5) = 12/50
P(6) = 9/50
Maka,
[tex]P(C)=\frac{12}{50}+\frac{9}{50} \\\\P(C)=\frac{21}{50}[/tex]
d. penjumlahan P(B) dan P(C)
[tex]P(B)+P(C)=\frac{29}{50}+ \frac{21}{50}=\frac{50}{50}=1[/tex]