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A violinist practices one hour a day from Monday through Friday. How

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Bunuel
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A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 06:24
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A violinist practices one hour a day from Monday through Friday. How many hours must she practice on Saturday in order to have an average (arithmetic mean) of two hours a day for the six-day period?

A. 5
B. 6
C. 7
D. 8
E. 12
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C
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 06:28
2 hours a day for 6 day period is

12 hours (2*6)

monday to friday =5 hours

she thus has to practice 12-5 =7 hours on saturday
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 06:46
Total hours of practice from Monday through Friday = 1*5 = 5
Average for 6 day period = 2
Total hours for 6 day period = 6*2 = 12 hours

Hours of practice on Saturday = 12-5 = 7 hours
Answer C
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 12:38
Bunuel wrote:
to have an average (arithmetic mean) of two hours a day for the six-day period?
Sum of the hours of 6 day week is 12( 2*6)

Bunuel wrote:
A violinist practices one hour a day from Monday through Friday.
Total hours practiced from Monday to friday is 5
Bunuel wrote:
How many hours must she practice on Saturday in order to have an average (arithmetic mean) of two hours a day for the six-day period?
No of hours she needs to practice on saturday is 7 ( 12-5)

So, Answer is (C) 7
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 22:06
Bunuel wrote:
A violinist practices one hour a day from Monday through Friday. How many hours must she practice on Saturday in order to have an average (arithmetic mean) of two hours a day for the six-day period?

A. 5
B. 6
C. 7
D. 8
E. 12



Average hours of practice for six days from Monday to Saturday = 2 hours
Total hours of practice for 6 days = 2*6 = 12 hours
Hours practiced from Monday to Friday (5 days) = 1 hour * 5 = 5 hours
So practice hours on Saturday to get an average of 2 hours = Total - Practiced hours = 12 - 5 = 7 Hours
Hence C.
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   03 Dec 2015, 22:16
No of hours practiced - 1*5 = 5
Avg hrs = total hours/no. of days
2= total hrs/6 so total hours must be 12
12-5 = 7
Ans option C
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   21 Oct 2016, 03:58
Average for 6 day - period with 2 hrs a day gives a total of 12 hrs
out of these she practices 1 hr daily from monday to friday for a total of 5 hrs
so to complete a grand total of 12 hrs she needs to practice 7 hrs on saturday
Correct answer - C
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink] New post   28 Oct 2020, 04:06
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Re: A violinist practices one hour a day from Monday through Friday. How [#permalink]
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