Three Englishmen and three Frenchmen work for the same company. Each of them knows a secret not known to others. They need to exchange these secrets over person-to-person phone calls so that eventually each person knows all six secrets. |
None of the Frenchmen knows English and only one Englishman knows French. What is the minimum number of phone calls needed for the above purpose? |
A) 5
B) 10
C) 9
D) 15
Correct Answer: C
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