Mean: add A1+A2+A3+A4+……..+An then divide by 2 means 8+5+7+10+15+21=66/2=33
Answer:
on the seventh day
Step-by-step explanation:
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Answer:
The highest would be the letter B and the lowest would be letter C if the pat is what you need to know.
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There are 80 children. 45 of them are girls. The amount of boys is equal to:

That means there are 45 girls and 35 boys.
The ratio of boys to girls is: 
Simplify:

Your answer is 7:9