CAT 2020 Slot 3 QA Q16 Permutations & Probability

Question 16 of the Quantitative Ability (QA) section, CAT 2020 Slot 3, with CAT's official answer.

How many integers in the set {100, 101, 102, ..., 999} have at least one digit repeated?

TITA: type in the answer. There are no options and no negative marking.

Answer: 252 Permutations & Probability TITA

A worked solution for this question is being written. Meanwhile, practise it in a timed mock and see how other aspirants did.

Same concept in other years

See every question on Counting numbers with distinct digits under conditions.

More Permutations & Probability questions from CAT

All 21 Permutations & Probability questions asked since 2017.