Question

For each meal Shasta is given an option between 3 different entrees, longhorn, roadrunner and collie. 50% of the time Shasta chooses longhorn, 30% of the time she chooses Collie, 10% of the time she chooses roadrunner, and 10% of the time she does not eat. For any given meal, what is the probability that Shasta will eat longhorn or collie?

Answer 1

The probability that Shasta will eat longhorn or collie is 80%

Explanation:

The probability of Shasta to eat longhorn is 50%.

And the probability of Shasta to eat collie is 30%

Therefore, you need to add up those two percentages to get the probability of eating longhorn or collie.

50%+30% = 80% or 0.8