Simple Probability

Simple Probability

	total ways a specific outcome will happen
Probability =
	total number of possible outcomes

Example: There are 87 marbles in a bag and 68 of them are green. If one marble is chosen, what is the probability that it will be green?

Solution
• Divide the number of ways to choose a green marble (68) by the total number of marbles (87)
• 68 ÷ 87 = 0.781609
• Round to the desired precision (e.g. 0.781609 rounded to hundredths is 0.78)