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Diketahui X berdistribusi binomial Tabel distribusi probabilitas dari variabel acak X adalah ....

Diketahui X berdistribusi binomial begin mathsize 14px style b open parentheses 3 comma 3 over 5 close parentheses end style

Tabel distribusi probabilitas dari variabel acak X adalah ....

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Perhatikan bahwa X berdistribusi binomial dengan dan maka Untuk Untuk Untuk Untuk Sehingga didapatkan tabel distribusi probabilitasnya adalah sebagai berikut Maka, jawaban yang tepat adalah E.

Perhatikan bahwa X berdistribusi binomial dengan begin mathsize 14px style n equals 3 end style dan size 14px p size 14px equals size 14px 3 over size 14px 5 maka

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P open parentheses X equals x close parentheses end cell equals cell C subscript x blank end subscript superscript n times blank p to the power of x times left parenthesis 1 minus p right parenthesis to the power of n minus x end exponent end cell row cell P open parentheses X equals x close parentheses end cell equals cell C subscript x blank end subscript superscript 3 times blank 3 over 5 to the power of x times open parentheses 1 minus 3 over 5 close parentheses to the power of 3 minus x end exponent end cell end table end style

Untuk begin mathsize 14px style P open parentheses X equals 0 close parentheses end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P open parentheses X equals 0 close parentheses end cell equals cell C subscript 0 blank end subscript superscript 3 times open parentheses 3 over 5 close parentheses to the power of 0 times open parentheses 1 minus 3 over 5 close parentheses to the power of 3 minus 0 end exponent end cell row cell P open parentheses X equals 0 close parentheses end cell equals cell fraction numerator 3 factorial over denominator open parentheses 3 minus 0 close parentheses factorial 0 factorial end fraction times open parentheses 3 over 5 close parentheses to the power of 0 times open parentheses 2 over 5 close parentheses cubed end cell row cell P open parentheses X equals 0 close parentheses end cell equals cell fraction numerator 3 factorial over denominator 3 factorial 0 factorial end fraction times open parentheses 3 over 5 close parentheses to the power of 0 times open parentheses 2 over 5 close parentheses cubed end cell row cell P open parentheses X equals 0 close parentheses end cell equals cell open parentheses 2 over 5 close parentheses cubed end cell row cell P open parentheses X equals 0 close parentheses end cell equals cell 8 over 125 blank end cell end table end style

Untuk begin mathsize 14px style P open parentheses X equals 1 close parentheses end style

begin mathsize 14px style P open parentheses X equals 1 close parentheses equals C subscript 1 blank end subscript superscript 3 times open parentheses 3 over 5 close parentheses to the power of 1 times open parentheses 1 minus 3 over 5 close parentheses to the power of 3 minus 1 end exponent P open parentheses X equals 1 close parentheses equals fraction numerator 3 factorial over denominator open parentheses 3 minus 1 close parentheses factorial 1 factorial end fraction times open parentheses 3 over 5 close parentheses to the power of 1 times open parentheses 2 over 5 close parentheses squared P open parentheses X equals 1 close parentheses equals fraction numerator 3 blank.2 factorial over denominator 2 factorial 1 factorial end fraction times open parentheses 3 over 5 close parentheses to the power of 1 times open parentheses 2 over 5 close parentheses squared P open parentheses X equals 1 close parentheses equals 3 times open parentheses 3 over 5 close parentheses to the power of 1 times open parentheses 2 over 5 close parentheses squared P open parentheses X equals 1 close parentheses equals fraction numerator 36 blank over denominator 125 end fraction end style

Untuk begin mathsize 14px style P open parentheses X equals 2 close parentheses end style

begin mathsize 14px style P open parentheses X equals 2 close parentheses equals C subscript 2 blank end subscript superscript 3 times open parentheses 3 over 5 close parentheses squared times open parentheses 1 minus 3 over 5 close parentheses to the power of 3 minus 2 end exponent P open parentheses X equals 2 close parentheses equals fraction numerator 3 factorial over denominator open parentheses 3 minus 2 close parentheses factorial 2 factorial end fraction times open parentheses 3 over 5 close parentheses squared times open parentheses 2 over 5 close parentheses to the power of 1 P open parentheses X equals 2 close parentheses equals fraction numerator 3 blank.2 blank.1 factorial over denominator 1 factorial 2.1 factorial end fraction times open parentheses 3 over 5 close parentheses squared times open parentheses 2 over 5 close parentheses to the power of 1 P open parentheses X equals 2 close parentheses equals 3 times open parentheses 3 over 5 close parentheses squared times open parentheses 2 over 5 close parentheses to the power of 1 P open parentheses X equals 2 close parentheses equals fraction numerator 54 blank over denominator 125 end fraction end style

Untuk begin mathsize 14px style P open parentheses X equals 3 close parentheses end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P open parentheses X equals 3 close parentheses end cell equals cell C subscript 3 blank end subscript superscript 3 times open parentheses 3 over 5 close parentheses cubed times open parentheses 1 minus 3 over 5 close parentheses to the power of 3 minus 3 end exponent end cell row cell P open parentheses X equals 3 close parentheses end cell equals cell fraction numerator 3 factorial over denominator open parentheses 3 minus 3 close parentheses factorial 3 factorial end fraction times open parentheses 3 over 5 close parentheses cubed times open parentheses 2 over 5 close parentheses to the power of 0 end cell row cell P open parentheses X equals 3 close parentheses end cell equals cell fraction numerator 3 factorial over denominator 0 factorial 3 factorial end fraction times open parentheses 3 over 5 close parentheses cubed times open parentheses 2 over 5 close parentheses to the power of 0 end cell row cell P open parentheses X equals 3 close parentheses end cell equals cell 1 times open parentheses 3 over 5 close parentheses cubed times 1 end cell row cell P open parentheses X equals 3 close parentheses end cell equals cell fraction numerator 27 blank over denominator 125 end fraction end cell end table end style

Sehingga didapatkan tabel distribusi probabilitasnya adalah sebagai berikut

Maka, jawaban yang tepat adalah E.

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