The 68 - 95 - 99.7 rule, gives the basis to solve this question.
It says that for a normal distribution 95% of the results are between the mean minus 2 standard deviations and the mean plus 2 standard deviations.
Here:
mean = 64.5 inches,
standard deviaton = 2.5 inches
mean - 2 standard deviations = 64.5 inches - 5 inches = 59.5 inches
mean + 2 standard deviations = 64.5 inches + 5 inches = 69.5 inches
Then, the answer is that 95% of women range approximately between 59.5 inches and 69.5 inches.
HELLO !
Okay so what you do is<em> eliminate the parenthesis </em>in the equation because it really helps
So you would multiply 8 and b
Also multiple 8 and a
You would get 8b and 8a
Your equation would look like ...
2a + 8b + 8a = ...
<em>Now you add the alike things in the equation </em>
8a and 2a are the alike things.
Now you would have ...
10a + 8b = ?
Answer: 25 girls
Step-by-step explanation:
10% left handed
90%(9/10) right handed
1:9
