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tidwellboston
22.04.2020 •
Mathematics
"Cyber Monday is a huge online shopping day. In 2017, approximately 21% of Cyber Monday shoppers used their mobile device to make a purchase. If a person used a mobile device to make a purchase, the probability of making a purchase from Amazon was .55. Suppose a Cyber Monday purchase is selected at random. What is the probability that the purchase was made with a mobile device and was from Amazon."
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Ответ:
11.55% probability that the purchase was made with a mobile device and was from Amazon.
Step-by-step explanation:
We have these following probabilities:
21% probability that a Cyber Monday shopper used their mobile device to make a purchase.
55% probability that a purchase made with a mobile device is from Amazon.
What is the probability that the purchase was made with a mobile device and was from Amazon."
55% of 21%
So
P = 0.21*0.55 = 0.1155
11.55% probability that the purchase was made with a mobile device and was from Amazon.
Ответ:
shirts=26
Jeans=5
i think thats the answer