Step-by-step explanation:
<u>Permutations</u>:
n<em>P</em><em> </em>r = n!/(n + r)!
<u>Combinations</u>:
<em>nCr</em> = n!/(n - r)!r!
c - combination
p - permutations
Since in both the problems they are looking for different groups, it is a combination problem. the order in which the people were selected in each group is not important, what is required are different groups.
<u>A.</u>
n = 51
r = 3
51<em>C</em><em> </em>3 = 51! / ((51 - 3) ×3!)
<em>51C</em><em>3</em><em> </em><em>=</em><em> </em><em>2</em><em>0</em><em> </em><em>8</em><em>2</em><em>5</em><em> </em>groups
<u>OR:</u>


<em><u>B</u></em><em><u>.</u></em>


Answer:
You answer is B i believe. If it is not, then it is A. I know for sure it is not C or D.
Step-by-step explanation:
Answer:
$12.90
Step-by-step explanation:
multiply a $1.29 by 10 pounds and you get your answer:)
Answer:
the answer is 33 use the ratio below
Step-by-step explanation:
22:100
33 :150