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Q.



Set up an equation in the following case:

The teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87. Take the lowest score to be L
 


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a

2L + 7 = 83

b

2L + 7 = 87

c

2L + 4 = 87

d

2L + 5 = 30 

answer is B.

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Detailed Solution

Given a statement, the teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7. The highest score is 87.
Let us assume the lowest score = L.
Now, the highest marks are 7 plus twice the lowest marks.
Therefore, the highest marks = 2L + 7.
But it is given that the highest marks are 87, equating both.
The equation is, 2L + 7 = 87.
Hence, option 2 is correct.
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