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Answer:
Probability that a customer selected at random has received either seaweed wrap or shiatsu massage is 0.33.
Step-by-step explanation:
We are given that a health spa offers holiday promotional treatment packages at a discount. Its recent tally for 4th of July holiday showed that 18% of the customers received seaweed wraps, 25% received shiatsu massages and 10% received both.
Let Probability that customers received seaweed wraps = P(SW) = 0.18
Probability that customers received shiatsu massages = P(SA) = 0.25
Probability that customers received both seaweed wraps and shiatsu massages = = 0.10
<em>Now, we have to find the probability that a customer selected at random has received either seaweed wrap or shiatsu massage.</em>
So, probability that a customer selected at random has received either seaweed wrap or shiatsu massage is given by =
<u>As we know that;</u>
So, according to our question;
= 0.18 + 0.25 - 0.10
= 0.43 - 0.10 = 0.33
Hence, probability that a customer selected at random has received either seaweed wrap or shiatsu massage is 0.33.