I believe D). 5 is the answer. If you clearly think about it, it actually might make sense. You just count the lines pointing from up to down.
Answer:
56 total
Step-by-step explanation:
Let the number of girls = x
Let the number of boys = 3x
x 1
=== = ==========
x + 28 3
Cross multiply
3x = x + 28 Subtract x from both sides
3x - x = 28 Combine
2x = 28 Divide by 2
x = 28/2
x = 14
Girls = 14
Boys = 14 + 28 = 42
Is the ratio 3 to 1?
42/14 = 3/1 Yes it does
Total number
14 + 42 = 56
Answer:
C. a numerical expression.
Step-by-step explanation:
Right away, what you should know is that this is an expression. Equations are expressions, except wiht an equal sign. This is not algabraeic though, since there is no valuable (for example 3x, or 7a). So, through the process of elimination, the answer would be a numerical expression.
Hope this helps!
Answer: 0.6368
Step-by-step explanation:
Given : The proportion of z-test for population mean : 
Sample size : 
We assume that this is normally distributed.
The test statistic for population proportion :-

Now, for
, we have

By using the standard normal distribution table , the probability that at least 82% of the surveyed students will be attending college will be :-

Hence, the probability that at least 82% of the surveyed students will be attending college = 0.6368