Job Recruitment Website - Recruitment portal - Party A, Party B and Party C participate in the recruitment interview of a company, and those who pass the interview can formally sign the contract. Party A said to sign the contract as long as the in

Party A, Party B and Party C participate in the recruitment interview of a company, and those who pass the interview can formally sign the contract. Party A said to sign the contract as long as the in

Party A, Party B and Party C participate in the recruitment interview of a company, and those who pass the interview can formally sign the contract. Party A said to sign the contract as long as the interview passed, and Party B and Party C agreed: two. ㈠7/8㈡3/8

Solution: A, B and C respectively indicate that events A, B and C are qualified in the interview.

and

(i) The probability that at least one person will pass the interview is

(II) The probability that no one has signed the contract is