Doubt regarding a Q of Standardisation and its occurrence on the gre

Will such type of questions of standardization come in the exam. ecause it’s mentioned under the solution that it won’t?(i didnt understand what won’t come) and if yes, can somebody please explain me an easier way to solve this as the original method - it did not even occur to me that I can solve it that way :sob: im weak at quants thus

This question can come. What is unlikely to come is its use in Statistics as described in the solution.

Try watching Standardization - PrepSwift .

If it’s still unclear, reply back.