12 people were at the party.
You can choose 12 people to be one person, and 11 to be a person they are shaking hands with. However, this allows us to choose person A, then person B, or Person B, then Person A. We don't want to double-count this case, so we divide by 2. 12*11/2=66, so 12 works.
Your answer is 110.6. If T remains constant with R, then divide R by 5, then multiply it by 7, then you have ur answer 110.6. Hope this helped!
Thanks!
~Steve
Nothing further can be done with this topic. Please check the expression entered or try another topic.
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