# Math logic

There are 20 children in the group. Every two children have a different name. Alena and John are among them. How many ways can we choose eight children to be among the selected

A) was John

B) was John and Alena

C) at least one was Alena, John

D) maximum one was Alena, John?

A) was John

B) was John and Alena

C) at least one was Alena, John

D) maximum one was Alena, John?

## Correct answer:

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