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The graph shows the distribution of the lengths (in seconds) of videos on a popular video-streaming site. The distribution is approximately Normal, with a mean of 264 seconds and a standard deviation of 75 seconds.
What percentage of videos on the streaming site are between 264 and 489 seconds?
a) 0.15%
b) 49.85%
c) 95%
d) 99.7%
Sagot :
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