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At a gathering of 10 people, there are 4 people who all know each other and 6 people who know no one. People who do not know each other shake hands. How many handshakes occur?

At a gathering of 10 people, there are 4 people who all know each other and 6 people who know no one. People who do not know each other shake hands. How many handshakes occur?
asked 218k views
3 votes
At a gathering of 10 people, there are 4 people who all know each other and 6 people who know no one. People who do not know each other shake hands. How many handshakes occur?

asked
User Denish
by
8.0k points

2 Answers

2 votes

Answer:

4

Explanation:

it is four that know each other but they are not shake hand

answered
User Jackarms
by
7.7k points
5 votes

Answer:

9

Explanation:

answered
User Ali Asjad
by
8.6k points
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