Question

Андрей, Борис, Владислав по очереди в случайном порядке подходят к прилавку киоска. Какова вероятность того, что Борис подойдет позже Андрея???

Answer 1

Всего вариантов "очереди" -6
АБВ    БАВ    ВАБ
АВБ    БВА    ВБА
Борис подойдет позже Андрея в трех случаях, значит вероятность
3/6 =1/2=0,5

Answer 2

Probability of Boris Approaching After Andrei

The probability of Boris approaching the kiosk after Andrei can be calculated using the concept of permutations. Since all three individuals approach the kiosk in a random order, the total number of possible orders they can approach in is 3! (3 factorial), which equals 6.

Out of these 6 possible orders, the orders where Boris approaches after Andrei are: 1. Andrei, Boris, Vladislav 2. Vladislav, Andrei, Boris

Therefore, the probability of Boris approaching after Andrei is 2 out of 6, which simplifies to 1 out of 3 or approximately 33.33%.