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4 years ago

9

the thrift store is selling their old DVDs. when the DVDs first came out, they sold for $19. they have been marked down 75%. wha

t is the sale price of a DVD?

2 answers:

vichka [17]4 years ago

3 0

$14.25
19.00•.75= $14.25

Norma-Jean [14]4 years ago

3 0

Answer:

4.75

Step-by-step explanation:

I just googled it, then subtracted the answer (14.25) from 19

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Answer:

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3 years ago

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Answer:

The new mean would be given by:

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And replacing we got:

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Step-by-step explanation:

We know that the original mean from the 28 students is given by:

$\bar X= \frac{\sum_{i=1}^{28} X_i}{28}= 83.6$

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And now we know that the new mean is 68.8 with the 25 new people so then the new mean would be given by:

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The sum of the values is:

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The new mean would be given by:

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And replacing we got:

$\bar X_f = \frac{2340.8+ 1720}{28+25}= 76.6$

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Step-by-step explanation:

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