In a room filled with 7 people, 4 people have exactly 1 sibling in the room and 3 people have exactly 2 siblings in the room. if two individuals are selected from the room at random, what is the probability that those two individuals are not siblings?
a. 5/21 b. 3/7 c. 4/7 d. 5/7 e. 16/21

Option E

Step-by-step explanation:

Number of ways of selecting two people from a group of seven people is

Number of ways by which two people selected in a room come out to be siblings are -

++

Number of ways by which two people selected in a room are not siblings

Probability of selecting two siblings

Hence, option E is correct

10

step-by-step explanation:

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