A random sample of adults was asked to respond to a survey about whether they use...
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A random sample of adults was asked to respond to a survey about whether they use their cell phones to shop for a specific item. One question, summarized in the table below reflecting probabilities, asked each respondent to choose whether or not they use a cell phone app to shop. The major age groupings were under 40 or 40 years or older. Find the probability that an adult randomly chosen from the group uses a cell phone app to shop. Age Yes No Under 40 40 or Older 0.40 0.20 0.10 0.30 0.50 0.50 1.00 0.60 0.40 A. 60% B. 50% C. 0.50% D. 40% A random sample of adults was asked to respond to a survey about whether they use their cell phones to shop for a specific item. One question, summarized in the table below reflecting probabilities, asked each respondent to choose whether or not they use a cell phone app to shop. The major age groupings were under 40 or 40 years or older. Find the probability that an adult randomly chosen from the group uses a cell phone app to shop. Age Yes No Under 40 40 or Older 0.40 0.20 0.10 0.30 0.50 0.50 1.00 0.60 0.40 A. 60% B. 50% C. 0.50% D. 40%
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