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Ksenya-84 [330]
2 years ago
9

A Web music store offers two versions of a popular song. The size of the standard version is 2.2 megabytes (MB). The size of the

high-quality version is 4.7 MB. Yesterday, the high-quality version was downloaded twice as often as the standard version. The total size downloaded for the two versions was 2784 MB. How many downloads of the standard version were there?
Mathematics
1 answer:
LekaFEV [45]2 years ago
8 0

Answer:

2.2 MB the side of the nigh

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For the piecewise Function below, which of the following statments is true? Someone please help me
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Consider an urn containing 8 white balls, 7 red balls and 5 black balls.
weqwewe [10]

Answer + Step-by-step explanation:

1) The probability of getting 2 white balls is equal to:

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2) the probability of getting 2 white balls is equal to:

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3) The probability of getting at least 72 white balls is:

=C^{72}_{150}\times \left( \frac{8}{20} \right)^{72}  \times \left( \frac{7}{20} \right)^{78}  +C^{73}_{150}\times \left( \frac{8}{20} \right)^{73}  \times \left( \frac{7}{20} \right)^{77}  + \cdots +C^{149}_{150}\times \left( \frac{8}{20} \right)^{149}  \times \left( \frac{7}{20} \right)^{1}  +\left( \frac{8}{20} \right)^{150}

=\sum^{150}_{k=72} [C^{k}_{150}\times  \left( \frac{8}{15} \right)^{k}  \times \left( \frac{7}{15} \right)^{150-k}]

5 0
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