dua buah dadu dilempar undi

Pembahasan

Dua buah dadu dilempar undi bersama-sama. maka

begin mathsize 14px style straight n left parenthesis straight S right parenthesis equals 6 cross times 6 equals 36 end style

Peluang muncul jumlah mata dadu 9

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell space straight A space left parenthesis jumlah space 9 right parenthesis end cell equals cell open curly brackets space left parenthesis 4 comma space 5 right parenthesis comma space left parenthesis 5 comma space 4 right parenthesis comma space left parenthesis 6 comma space 3 right parenthesis comma space left parenthesis 3 comma space 6 right parenthesis space close curly brackets space end cell row cell straight n left parenthesis straight A right parenthesis end cell equals 4 end table end style

Peluang muncul jumlah mata dadu 10

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight B space left parenthesis jumlah space 10 right parenthesis space end cell equals cell open curly brackets left parenthesis 4 comma space 6 right parenthesis comma space left parenthesis 5 comma space 5 right parenthesis comma space left parenthesis 6 comma space 4 right parenthesis close curly brackets end cell row cell straight n left parenthesis straight B right parenthesis end cell equals 3 end table end style

Peluang muncul jumlah mata dadu 9 atau 10

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell P space left parenthesis A space a t a u space B right parenthesis end cell equals cell P left parenthesis A right parenthesis plus P left parenthesis B right parenthesis end cell row blank equals cell fraction numerator n left parenthesis A right parenthesis over denominator n left parenthesis S right parenthesis space end fraction plus fraction numerator n left parenthesis B right parenthesis over denominator n left parenthesis S right parenthesis end fraction end cell row blank equals cell space 4 over 36 plus 3 over 36 end cell row blank equals cell space 7 over 36 end cell end table end style

Jadi, jawaban yang tepat adalah B

 

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