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Whats the equation to the follwing: There are 10 questions worth 7 points each, and 16...

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rawrhappy | Student, Grade 10 | (Level 1) Honors

Posted October 11, 2012 at 4:24 AM via web

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Whats the equation to the follwing:

There are 10 questions worth 7 points each, and 16 questions worth 5 points each.

 

The question is word problem and its like this:

You have to take a mathematics achievement test. Two days before the test you recieve the follwoing instructions concerning the point values of the two kinds of equations, and how many of each you must answer.

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prashansaranjan | Student, College Freshman | (Level 1) eNoter

Posted October 11, 2012 at 8:27 AM (Answer #1)

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let each question of 7 points be denoted by X.and each question of 5 points be represented by Y.

SO,the equation comes to be

10X+16Y=Z

now the number of question to be attempted depends on passing marks.

if 50%is passing marks then,

u can attempt all 10 7 points questions and 1 5 points question.your total will come to 75...

u can attempt even this combination

7 points question            5 points question

   5 questions                   8 questions

    10 questions                 1 question

u can even attempt more than 75 marks questions so that u score good marks.

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