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# Camille's average on her 6 math tests this marking period is 75. Fortu

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Math Expert
Joined: 02 Sep 2009
Posts: 58458
Camille's average on her 6 math tests this marking period is 75. Fortu  [#permalink]

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31 Jan 2019, 22:22
00:00

Difficulty:

15% (low)

Question Stats:

90% (01:20) correct 10% (00:38) wrong based on 24 sessions

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Camille's average on her 6 math tests this marking period is 75. Fortunately for Camille, her teacher drops each student's lowest grade, and this raises her average to 85. What was her lowest grade?

A) 20

B) 25

C) 30

D) 40

E) 50

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Re: Camille's average on her 6 math tests this marking period is 75. Fortu  [#permalink]

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01 Feb 2019, 00:01
1
Bunuel wrote:
Camille's average on her 6 math tests this marking period is 75. Fortunately for Camille, her teacher drops each student's lowest grade, and this raises her average to 85. What was her lowest grade?

A) 20

B) 25

C) 30

D) 40

E) 50

Average of 6 tests = 75

i.e. total of the 6 test scores = 6*75 = 450

After lowest grade's drop only 5 tests will be considered

i.e. total of best 5 scores out of 6 tests = 5*85 = 425

i.e. Lowest grade score = 450-425 = 25

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Re: Camille's average on her 6 math tests this marking period is 75. Fortu  [#permalink]

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01 Feb 2019, 11:25
Bunuel wrote:
Camille's average on her 6 math tests this marking period is 75. Fortunately for Camille, her teacher drops each student's lowest grade, and this raises her average to 85. What was her lowest grade?

A) 20

B) 25

C) 30

D) 40

E) 50

6 tests tota; = 75* 6 = 450
after 1 test is dropped ; 85 * 5 = 425
so 450-425 = 25
IMO B
Re: Camille's average on her 6 math tests this marking period is 75. Fortu   [#permalink] 01 Feb 2019, 11:25
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# Camille's average on her 6 math tests this marking period is 75. Fortu

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