Answer:

Let's assume the lowest mark is

′

x

′

.

twice the lowest mark will be 2x

given that twice the lowest marks plus seven is highest mark.

=> 2x+7=87

=>2x=80

=>x=40

Hence the lowestmark is 40.

Question:

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?

Given:

The highest marks = 87

To Find:

The lowest marks

Solution:

Let the lowest marks be x

Highest marks = 2 times lowest marks + 7

Answer:

Lowest marks = 40