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Kanchan has 10 friends among whom two ar...

Kanchan has 10 friends among whom two are married to each other. She wishes to invite five of them for a party. If the married couples refuse to attend separately, then the number of different ways in she can invite five friends is a. `^8C_5` b. `2xx^8C_3` c. `^10 C_5-2xx^8C_4` d. none of these

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