Mathematics
Mathematics, 15.07.2019 05:00, jahootey3042

The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of .5 minutes. what is the probability that a conversation lasts longer than 3 minutes?

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Mathematics, 26.06.2019 11:00, levicorey846
The length of a text messaging conversation is normally distributed with a mean of 10 minutes and a standard deviation of 4 minutes. what is the probability that a conversation lasts longer than 20 minutes?
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Mathematics, 20.07.2019 15:10, mahi2840
Can someone just explain what i need to do? i'm so confused the length of a text messaging conversation is normally distributed with a mean of 10 minutes and a standard deviation of 4 minutes. what is the probability that a conversation lasts longer than 20 minutes?
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