**16-reel slot machines**

**2. Case B – different numbers of stops and symbol
distributions on the reels**

** 2.7**
**A specific symbol at least three times on a
payline**

The probability of this event is , where are the basic probabilities of that symbol occurring on the reels respectively.

** 2.9 A specific symbol four times or another
specific symbol at least three times on a
payline**

The probability of this event is , where are the basic probabilities of the two symbols occurring on the reels respectively.

** 2.10 A specific
symbol four times or any combination of that symbol with another specific
symbol on a
payline**

The probability of this event is

, where are the basic probabilities of the two symbols occurring on the reels respectively.

** **