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vova2212 [387]
3 years ago
5

A piano has 88 keys. Fifty-two of the keys are white.

Mathematics
1 answer:
Tcecarenko [31]3 years ago
8 0

Answer:

36

Step-by-step explanation:

88 - 52

=36

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a student either knows the answer or guesses. Let 3434 be the probability that he knows the answer and 1414 be the probability t
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Answer:    \dfrac{12}{13}

Step-by-step explanation:

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By Bayes theorem , we have

P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(B|A')P(A')}\\\\ P(A|B)=\dfrac{1\times\dfrac{3}{4}}{1\times\dfrac{3}{4}+\dfrac{1}{4}\times\dfrac{1}{4}}\\\\= \dfrac{12}{13}

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Expanded form pretty much means that you break down every digit into an addition phrase. So, for 418,832, that would mean:
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4 0
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Answer:

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First Of All Please Follow This
PEMDAS

P: ()
E:^
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