Question

What is the PROBABILITY of being born on a weekend? What is the probability that you get at least a 3a on a dice?

Answer 1

Understanding probability is a useful skills. It allows you to make informed choises that are not based on subjective feelings but an understanding of reality.

Let's revise the theory about Probability:

Here's an example of a real life situation where probability is useful. 

Sports Strategies

Athletes and coaches use probability to determine the best sports strategies for games and competitions. A baseball coach evaluates a player's batting average when placing him in the lineup. For example, a player with a 200 batting average means he's gotten a base hit two out of every 10 at bats. A player with a 400 batting average is even more likely to get a hit – four base hits out of every 10 at bats. Or, if a high-school football kicker makes nine out of 15 field goal attempts from over 40 yards during the season, he has a 60 percent chance of scoring on his next field goal attempt from that distance. The equation is: 9/15 = 0.60 or 60%

Source

Here's a good website for excercises