Question

In a defective six-sided dice the probability of getting an odd number is twice the probability of getting an even number.What is the probability of getting 5 in a single throw?


i knew the answer but i need clear explanation

Answer 1

Since the probability of getting odd is twice getting even, you have these possible outcomes all equally probable:
1, 1, 2, 3, 3, 4, 5, 5, 6
There are 6 odd outcomes, and 3 even outcomes, or twice as many odds as evens.
You are interested in an outcome of 5, so it's the number of outcomes of 5 over the total number of outcomes.