Easy brain teaser

[danielfunnyme]

A simple question about moderation :
In a exam, Mr tan found that the questions were too difficult for the students. He decided to apply a mass moderation on the scores. The lowest and the highest scores were 20 and 70. Help Mr tan modify the scores in a fair way such that all students will get better grades with the requirements of :
1. Lowest score 20 to be 50
2. Highest score which is 70 to not go beyond 90.

 

[Deleted member 4993]

A simple question about moderation :
In a exam, Mr tan found that the questions were too difficult for the students. He decided to apply a mass moderation on the scores. The lowest and the highest scores were 20 and 70. Help Mr tan modify the scores in a fair way such that all students will get better grades with the requirements of :
1. Lowest score 20 to be 50
2. Highest score which is 70 to not go beyond 90.

Use linear transformation.

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