Question

Which of the following events has a probability of 1? Check all that apply.
landing on a blue or red space on a spinner with 1 blue space and 1 red space
choosing a red marble from a bag containing red and green marbles
drawing a peanut from a bag of trail mix with 4 types of nuts
drawing a red card from a stack of 20 red cards
getting a heads or a tails when flipping a coin

Answer 1

The events with probability 1 are:
- landing on a blue or red space on a spinner with 1 blue space and 1 red space (the spinner has only those two spaces),
- drawing a red card from a stack of 20 red cards (all cards are red),
- getting a heads or a tails when flipping a coin (assuming the coin lands either heads or tails).

The others are not certain (you could pick a green marble or a non-peanut).