NinetynineCAT 2018 Slot 1 QA Q5 Ratio, Mixtures & Averages
Question 5 of the Quantitative Ability (QA) section, CAT 2018 Slot 1, with CAT's official answer.
A CAT aspirant appears for a certain number of tests. His average score increases by 1 if the first 10 tests are not considered, and decreases by 1 if the last 10 tests are not considered. If his average scores for the first 10 and the last 10 tests are 20 and 30, respectively, then the total number of tests taken by him is [TITA]
TITA: type in the answer. There are no options and no negative marking.
Answer: 60 Ratio, Mixtures & Averages TITA
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