Question

ii) 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. What is the lowest score?​

Answer 1

Answer:

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let the highest mark b x and lowest mark be y then the equation will be

x = 2 Y + 7

87=2y+7.

87-7=2y

80=2y.

y=80/2

y=40..marks

Answer 2

Solution:

Given that teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7

Highest score is 87

To find: the lowest score

From given question,

highest marks = twice the lowest marks plus 7

highest marks = 2(lowest marks) + 7

From above we know that highest score = 87

87 = 2(lowest marks) + 7

87- 7 = 2(lowest marks)

2(lowest marks) = 80

lowest marks = 40

Thus the lowest score is 40

Learn more about this topic

The mark (out of the 100) obtained by a group of students in a science test are 85,76, 90,85,39 ,48,56,95,81and 75 find the,(a) highest and lowest mark obtained by student (b) mean marks obtained (c) number of student securing marks more than the mean marks.

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The average marks of a student in 10 papers are 80. If the highest and the lowest scores are not considered, the average is 81. Of his highest score is 92, find the lowest.

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