The public relations department of a company wants to recruit a manager, and it is required to test the communication ability, organizational ability and practical ability of the candidate. Xiao Ming

The public relations department of a company wants to recruit a manager, and it is required to test the communication ability, organizational ability and practical ability of the candidate. Xiao Ming is known to have passed the test in communication skills. 1. The probability that all three tests pass is 1/4, so 2/3 * x * y =1/4; The probability of passing at least one of the three tests is 23/24, so the probability of failing all three tests is (1-x) * (1-2/3) * (1-y) =1-23/24 =/kloc.