Ten slips of paper numbered 1 to 10 are placed in a bag. You draw a slip at random, replace it, then draw another slip. Find the probability that both numbers are odd.
There are 100 possible outcomes (1010) and only 25 of those are odd both times (55 because there are 5 odd numbers) this means that the probability of getting both odd numbers is 25/100 which is 1/4 or 25%