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Dalam suatu pertandingan basket, tim A mempunyai peluang untuk menang sebesar 8 3 ​ apabila bertanding. Jika tim A bermain dalam empat babak, hitunglah peluang tim A akan menang: b. paling sedikit 1 babak

Dalam suatu pertandingan basket, tim A mempunyai peluang untuk menang sebesar  apabila bertanding. Jika tim A bermain dalam empat babak, hitunglah peluang tim A akan menang:

b. paling sedikit  babak

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Mahasiswa/Alumni Universitas Sriwijaya

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Jawaban

peluang tim A akan menang paling sedikit babak adalah .

peluang tim A akan menang paling sedikit undefined babak adalah begin mathsize 14px style fraction numerator 3.471 over denominator 4.096 end fraction end style.

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Pembahasan

Jadi, peluang tim A akan menang paling sedikit babak adalah .

begin mathsize 14px style n equals 4 peluang space menang equals p equals 3 over 8 peluang space kalah equals q equals 1 minus 3 over 8 equals 5 over 8 end style 

begin mathsize 14px style P subscript x equals C subscript x superscript n p to the power of x q to the power of n minus x end exponent end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P open parentheses x greater or equal than 1 close parentheses end cell equals cell P open parentheses x equals 1 close parentheses plus P open parentheses x equals 2 close parentheses plus P open parentheses x equals 3 close parentheses plus P left parenthesis x equals 4 right parenthesis end cell row blank equals cell C subscript 1 superscript 4 open parentheses 3 over 8 close parentheses open parentheses 5 over 8 close parentheses cubed plus C subscript 2 superscript 4 open parentheses 3 over 8 close parentheses squared open parentheses 5 over 8 close parentheses squared plus C subscript 3 superscript 4 open parentheses 3 over 8 close parentheses cubed open parentheses 5 over 8 close parentheses plus C subscript 4 superscript 4 open parentheses 3 over 8 close parentheses to the power of 4 open parentheses 5 over 8 close parentheses to the power of 0 end cell row blank equals cell fraction numerator 4 factorial over denominator 1 factorial times 3 factorial end fraction open parentheses 3 over 8 close parentheses open parentheses 125 over 512 close parentheses plus fraction numerator 4 factorial over denominator 2 factorial times 2 factorial end fraction open parentheses 9 over 64 close parentheses open parentheses 25 over 64 close parentheses plus fraction numerator 4 factorial over denominator 3 factorial times 1 factorial end fraction open parentheses 27 over 12 close parentheses open parentheses 5 over 8 close parentheses plus fraction numerator 4 factorial over denominator 4 factorial times 0 factorial end fraction open parentheses fraction numerator 81 over denominator 4.096 end fraction close parentheses open parentheses 1 close parentheses end cell row blank equals cell fraction numerator 4 cross times 3 factorial over denominator 1 factorial times 3 factorial end fraction open parentheses fraction numerator 375 over denominator 4.096 end fraction close parentheses plus fraction numerator 4 cross times 3 cross times 2 factorial over denominator 2 factorial times 2 factorial end fraction open parentheses fraction numerator 225 over denominator 4.096 end fraction close parentheses plus fraction numerator 4 cross times 3 factorial over denominator 3 factorial times 1 factorial end fraction open parentheses fraction numerator 135 over denominator 4.096 end fraction close parentheses plus fraction numerator 4 factorial over denominator 4 factorial times 0 factorial end fraction open parentheses fraction numerator 81 over denominator 4.096 end fraction close parentheses end cell row blank equals cell 4 open parentheses fraction numerator 375 over denominator 4.096 end fraction close parentheses plus 6 open parentheses fraction numerator 225 over denominator 4.096 end fraction close parentheses plus 4 open parentheses fraction numerator 135 over denominator 4.096 end fraction close parentheses plus 1 open parentheses fraction numerator 81 over denominator 4.096 end fraction close parentheses end cell row blank equals cell open parentheses fraction numerator 1.500 over denominator 4.096 end fraction close parentheses plus open parentheses fraction numerator 1.350 over denominator 4.096 end fraction close parentheses plus open parentheses fraction numerator 540 over denominator 4.096 end fraction close parentheses plus open parentheses fraction numerator 81 over denominator 4.096 end fraction close parentheses end cell row blank equals cell fraction numerator 3.471 over denominator 4.096 end fraction end cell end table end style   

Jadi, peluang tim A akan menang paling sedikit undefined babak adalah begin mathsize 14px style fraction numerator 3.471 over denominator 4.096 end fraction end style.

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