TS EAMCET 11-Sep-2020 Shift 2 Solved Paper

If we form a 4-digit number by using the digits 4,5,6,7,8,9 allowing repetition, then we can categories the remainders on dividing by 3 as 0,1 or 2, so the probability to form a number which is exactly divisible by 3 is ‌

1

3

.