3 years ago

the probability of being a girl in this class is 4/7 and there are 12 boys find the total number of students

Mathematics

1 answer:

Eduardwww [97]3 years ago

8 0

Step-by-step explanation:

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A new car is purchased for $44,000 and over time its value depreciates by one half every 5.5 years. What is the value of the car

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In a random sample of 30 sixth graders, 9 had traveled outside of the United States. There are a total of 120 sixth graders in t

Aleksandr-060686 [28]

36 students have traveled outside of the United States, when there are total 120 sixth graders.

<u><em>Explanation</em></u>

The number of students traveled outside of the United States is 9 when there is total 30 sixth graders. So, the ratio of the student traveled to the total students will be $9: 30 = 3: 10$

Now there are total of 120 sixth graders in the school and lets assume the number of students traveled outside the United states is $x$ . That means the ratio...

$x: 120 = 3:10 \\ \\ \frac{x}{120}=\frac{3}{10} \\ \\ 10x=360\\ \\ x=\frac{360}{10} \\ \\ x= 36$

So, 36 students have traveled outside of the United States.

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the probability of being a girl in this class is 4/7 and there are 12 boys find the total number of students​

the probability of being a girl in this class is 4/7 and there are 12 boys find the total number of students