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Ludmilka [50]
3 years ago
12

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is

3131 hours and the median is 27.227.2 hours. twenty-four of the families in the sample turned on the television for 1616 hours or less for the week. the 7th percentile of the data is 1616 hours. step 2 of 5 : approximately how many families are in the sample? round your answer to the nearest integer.
Mathematics
1 answer:
nikdorinn [45]3 years ago
5 0
Not sure on the number listed as median ? 27.227.2? Please clarify.
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Step-by-step explanation:

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Kira, goran, & joe sent a total of 90 text messages during the weekend. Goran sent 5 fewer messages than Kira. Joe sent 3 ti
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Answer:

Kira sent 19 text messages, Goran sent 14  text messages  and Joe sent 57  text messages.

Step-by-step explanation:

Let be "k" the number of text messages that Kira sent during the weekend, "g" the number of text messages that Gora sent during the weekend and "j" the number of text messages that Joe sent during the weekend.

We know know that they sent a total of 90 text messages then:

k+g+j=90

Goran sent 5 fewer messages than Kira. This is:

g=k-5

And Joe sent 3 times as many messages as Kira. Then:

j=3k

The steps to solve this are:

- Substitute the second equation and the third equatio into the first equation  and then solve for "k":

k+(k-5)+(3k)=90\\\\5k-5=90\\\\5k=90+5\\\\k=\frac{95}{5}\\\\k=19

- Substitute this value into the second equation to find "g":

g=19-5=14

- Substitute the value of "k" into the third equation to find "j":

j=3(19)=57

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Step-by-step explanation:

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Answer: The answer is A.


Step-by-step explanation:


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