D) 0.19 is the probability that Kim will attend the party.
Given:
The probability terry attends is 0.31 and the probability chris attends is 0.5.
To find: Probability of kim attending the party
Concept :
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
The question here talks about exactly one of them attending the party so the sum of probability is equal to 1.
P(Terry) + P(Chris)+ P(Kim) = 1
0.31+0.5 + P(Kim) =1
P(Kim) = 0.19
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