GMAT 650 to 680 level Averages Practice #6 | Average After One Element Is Removed

GMAT Online Preparation | GMAT Quant | Statistics & Arithmetic Mean Practice #6

The concept tested in this question also is comparing averages of a set of data before and after an element is removed. The question is a notch more difficult than practice question #5    • GMAT Statistics & Average Practice #5...   Unlike as in question 5, in this question the average before or after the element is removed is not given.

We have solved the question using the standard framework to solve averages question discussed in the Averages Lesson Video @    • #GMAT Statistics Lesson Video | Avera...  

Question
In a group of 20 students, one of the students weighing 30 kg leaves the group and the average weight of the group drops by 0.2 kg. What is the average weight of the remaining 19 students?

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