Two mathematical problems of probability, When a store holds a celebration activity, customers can randomly select 2 different gifts from the 4 kinds of gifts when their consumption reaches a certain amount. The probability that one of the gifts selected by any two customers has the same variety is zero___ . The startup password of a device is composed of three different numbers from 0 to 9. If the wrong password is input three times in a row, the device will be shut down permanently. The probability that a person who only remembers that the password is composed of three different numbers can start some devices is 0___ .

Two mathematical problems of probability, When a store holds a celebration activity, customers can randomly select 2 different gifts from the 4 kinds of gifts when their consumption reaches a certain amount. The probability that one of the gifts selected by any two customers has the same variety is zero___ . The startup password of a device is composed of three different numbers from 0 to 9. If the wrong password is input three times in a row, the device will be shut down permanently. The probability that a person who only remembers that the password is composed of three different numbers can start some devices is 0___ .

There are 6 ways for each customer to choose a gift. Therefore, there are 6 × 6 = 36 ways for two customers to choose a gift