Question

the probability of 5 digit numbers that are made up of exactly two distinct digit is? ​

Answer 1

Answer:

648/9000

Step-by-step explanation:

2 distinct numbers only so we may have only 2 different number so

first digit can be filled in 9 ways excluding 0.

second digit can be any number apart from the first digit so it can also be 9 ways

number of digits formed can be

9*9*2*2*2=648

total 5 digit numbers are 9*10*10*10*10

probability = 648/9000