Answer:
Step-by-step explanation:
Ill let you be the judge of the correct answer, but from what i can see the correct answer is c
Mean = Sigma (summation) of x ÷ n
(Making Sigma x The subject of the formula)
Summation of x = Mean × n
= 8 × 15
The summation of all the scores= 120
The change of x is 20-5 = 15
New summation = 120 - 15 = 105
Using formula:
105 ÷ 15 = 7
ų = 7
We have 13 total shapes and 7 of them meet the criteria, so the probability is:
<span>
</span>P(<span>Square or Triange) = </span>
<span>or about
0.3888.....
or
38.88%</span>
<span> The ratio compares two quantities (in this case blue and white parts).
A unit rate (or unit ratio) describes how many units of the first type of quantity corresponds to one unit of the second type of quantity. In our case the first type of quantity is blue parts and the second is white parts, so we should find how many blue parts correspond to one white part.
The ratio is: 5/4
We will obtain the unit ratio if we divide each number with 4 in order to get 1 - as a second quantity.
So, (5/4)/(4/4)= (5/4)/1
The unit ratio is: </span>
<span>(5/4)/1.</span>
