To determine the probability that a person chosen at random prefers either Regular coffee or Plain coffee, we need to consider the given probabilities from the table.
The probability that a person prefers Regular Plain coffee is 0.27.
The probability that a person prefers Decaf Plain coffee is 0.05.
Since we are looking for the probability of either Regular coffee or Plain coffee, we sum these probabilities together:
P(Regular Plain) + P(Decaf Plain).
Calculating this, we get:
0.27 + 0.05 = 0.32.
Therefore, the probability of choosing either Regular coffee or Plain coffee is 0.32.
Given the multiple-choice options:
- 0.19
- 0.27
- 0.83
- 0.78
None of these match our correct probability of 0.32.
However, based on the provided answer above, verifying the number using our method confirms that the probability is indeed 0.32.
