Question

Kate and tom have three friends
Bob only knows Kate
Dino is a mutual friend of Helen and Monica
Helen any Jim don't have any mutual friend

Answer 1

Alice and Bob just met and there are chances that 5% of the people are friends with each one of them. There is a population of 1000 people. 50 of them are their friends.  

Explanation:

• X= Number of mutual friends.

• Ai= 1, ith person is the mutual friend.

• P (X=k)= 50/k. 950(50-k)/1000/50

Answer 2

Answer:

Solved today,after so many trials

Explanation:

Pls find the attached image.