Answer:
C.
Step-by-step explanation:
So there are 20 kids with brown hair and this represents 80% of the class total.
So this means 20=.8n since we don't know the total number of kids.
20=.8n
Divide both sides by .8
25=n
So 25 is the total number of kids.
C. is the answer
You could also setup this equation given that 80% is 80/100:
[tex]\frac{20}{\text{ total }}=\frac{80}{100}
To figure out what that total is there you can divide top and bottom of the fraction on right hand side by 4 which gives you the 20 on top and the 25 on bottom.
Answer:
7<em>9</em><em> </em><em>and </em><em>6</em><em>8</em><em> </em>
Step-by-step explanation:
Hopefully it will help you
Answer:
It is B. 15 because the formula for this is 2 (l+w) 15+6=21 21*2=42
Answer:
Step-by-step explanation:
Given
--- equal probability
<em>See comment for complete question</em>
Required:
To do this, we make use of complement rule:
The event that there is no girl out of the 3 children is: B B B
And the probability is:
So:
