Answer:
78 people claimed that they get at least eight hours of sleep each night.
Step-by-step explanation:
We know that 30 people claimed that they get an average of seven hours of sleep. Using the circular diagram, we find that these 30 people represent 25% of the total number of people.
According to the graph, people that get at least eight hours of sleep each night represent 65%, that is, 50% of the people sleep eight hours and 15% sleep nine or more.
Then, we use the rule of three, if 30 people represent 25% of the total, how many people would represents 65%?
[tex]x=65\%\frac{30 \ people}{25 \%} = 78 \ people[/tex]
Therefore, 78 people claimed that they get at least eight hours of sleep each night.
