A souvenir shop sells 25 cups, 30 picture frames a...

A souvenir shop sells 25 cups, 30 picture frames and 15 other souvenirs within two weeks. $begin mathsize 14px style Z end style$ is the event of selling a cup. Calculate the probability of selling other souvenirs.

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Jawaban:

$begin mathsize 14px style n left parenthesis S right parenthesis equals 70 comma space n left parenthesis Z right parenthesis equals 25 comma space n left parenthesis Z to the power of c right parenthesis equals 45 end style$

$begin mathsize 14px style P left parenthesis Z right parenthesis equals 25 over 70 equals 5 over 14 end style$

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The probability of selling other souvenirs than cup is $begin mathsize 14px style 9 over 14 end style$ .

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