lib/mutually_exclusive_collection.rb in rodders-3.0.0 vs lib/mutually_exclusive_collection.rb in rodders-3.0.1

@@ -41,10 +41,10 @@
 
   # the bookmaker's return rate
   # @return [Number] the bookmaker's return rate as a percentage
   def bookmakers_return_rate
     fs = fractions
-    1 - fs.reduce(:*) / fs.reduce(:+)
+    fs.any? ? 1 - fs.reduce(:*) / fs.reduce(:+) : 0
   end
 
   # hash of the odds and what percentage of the total stake should go on each
   # @return [Hash<FixedOdds, Number>] hash of odds to percentages
   def percentages
\ No newline at end of file