Sharon called 3 friends on Friday. On Saturday, each of those 3 friends called 3 different friends. On Sunday, each person who was called on Saturday called 3 different people.

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2020-04-27 15:26:33

the total would be 27 people

2020-04-27 15:27:48

Sharon called 3 friends, who called 3 more friends. You would do 3 * 3, which equals to 9. Then, the 9 people that was called on Saturday called 3 more people each, so you would multiply 9 by 3, which gets you 27. They called a total of 27 people.

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