If 30 people claimed that they get an average of seven hours of sleep, how many people claimed that they get at least eight hour

Question

Sedaia [141]

2 years ago

9

If 30 people claimed that they get an average of seven hours of sleep, how many people claimed that they get at least eight hour

s of sleep each night? [Type your answer as a number.]

Mathematics

2 answers:

Natali5045456 [20] · Answer 1 · 2022-06-05T12:59:49+03:00

Natali5045456 [20]2 years ago

7 0

60 people claimed they they got at least eight hours of sleep.

Arada [10] · Answer 2 · 2022-06-05T14:40:25+03:00

Answer:

<h2>78 people claimed that they get at least eight hours of sleep each night.</h2>

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, <em>if 30 people represent 25% of the total, how many people would represents 65%?</em>

$x=65\%\frac{30 \ people}{25 \%} = 78 \ people$

Therefore, 78 people claimed that they get at least eight hours of sleep each night.