Answer:
<em>Answer is</em><em> </em><em>given</em><em> </em><em>below with explanations</em><em>. </em>
Step-by-step explanation:

<em>HAVE A NICE DAY</em><em>!</em>
<em>THANKS FOR GIVING ME THE OPPORTUNITY</em><em> </em><em>TO ANSWER YOUR QUESTION</em><em>. </em>
Each group will have the same number of boys and girls in a group. Find common factors for the number of boys and girls.
6th grade :
64 girls = 8 * 8
72 boys = 8 * 9
There will be 8 groups consisting of 8 girls and 9 boys
7th grade :
81 girls = 9 * 9
63 boys = 9 * 7
There will be 9 groups consisting of 9 girls and 7 boys
8th grade :
68 girls = 4 * 17
60 boys = 4 * 12
There will be 4 groups consisting of 17 girls and 12 boys
Answer: Probability of twenty- dollar bill is 0.
Step-by-step explanation:
Number of five dollars = 2
Number of ten dollars = 9
Total number of dollars is given by

Since there is no twenty dollar bills.
So, Probability of getting twenty- dollar bill is given by

Hence, Probability of twenty- dollar bill is 0.
The answer is 7.5for the question
Well a double negative makes a positive so it is just thirty two. But if you arent supposed to change it it is negative parenthesis negative thirty two parenthesis.