Given that the sample space is the set of all 2-digit numbers whose digits are different and belong to , write the event that the number is odd.
What is the probability of choosing at random, two numbers which sum to 9, from the set ? You are allowed to pick the same number more than once.
I write a two-digit number by randomly picking each digit from the set , where a digit can be repeated. What is the probability that the product of the two digits is 32?