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In a survey of 40 people, 30 were on Snapchat, 28 were on Instagram, and four were neither on Snapchat nor Instagram. How many of

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In a survey of 40 people, 30 were on Snapchat, 28 were on Instagram, and four were neither on Snapchat nor Instagram. How many of the 40 people were on both Snapchat and Instagram, S n I? BFW Publishers SnI = people What is the probability that a randomly-selected person is on both Snapchat and Instagram, P(S n I)? P(S n D) = (Round to 3 decimal places)

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