Question: in a room with 10 people , 7 people have exactly 1 friend in the room and 6 people have exactly 2 friends in the room ( assuming that friendship is a mutual relationship , i . e . if jane is paul ' s friend , paul is jane ' s friend ) . if two individuals are selected from the room at random , what is the probability that those two individuals are not friends ?
A) 5 / 21
B) 3 / 7
C) 4 / 7
D) 5 / 7
E) 49 / 45
Correct answer: E
Grade: 7 | Topic: Statistics and Probability | Difficulty: Medium | Standard: 7.SP.C.7