Math Is Fun Forum

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

[ASK] Are the Frequency and the Score Switched?

Pay attention to the table below.

The amount of students who get above average are...
A. 9 students
B. 17 students
C. 18 students
D. 26 students
I got the average as

, which is eight point something. So, I got 7 + 8 = 15 as the answer, but it was not in the option. I then assume that the frequency and score must be switched, but now I got

which is six point something, so the answer should be 10 + 15 + 5 = 30 which was not in the options either. Where did I go wrong?

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bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: [ASK] Are the Frequency and the Score Switched?

Hi;

I am getting 43/5 for the mean (without switching) the answer I am getting is the same as yours.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

thickhead

Member

Registered: 2016-04-16

Posts: 1,086

Re: [ASK] Are the Frequency and the Score Switched?

I think irrespective of answers tallying or not,the first line must be score and the second frequency.For one score there is only one frequency but for different scores  same frequency may be there.Scores are given in increasing or decreasing order.

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phrontister

Real Member

From: The Land of Tomorrow

Registered: 2009-07-12

Posts: 4,893

Re: [ASK] Are the Frequency and the Score Switched?

Hi;

I agree with thickhead's reasoning and that the frequency and score should be switched for the problem to make sense.

If those two are switched, then the solution is one of those in the multiple-choice list.

Monox D. I-Fly has made an arithmetical error that accounts for his answer not appearing in the list.

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