Area of region 1/Total area = probability of a dart landing in region 1.

Because probability = desired outcome/all possible outcomes.

Area of region 1= 6*6=361 ft².

Total area =10*10=100ft².

Area of region 1/Total area =36 ft²/100ft²=.36.

36% of 50 darts will land in region 1. 50 darts *.36= 18 darts.

64% of 50 darts will land in region 2 50 darts *.64= 32 darts.
 

18 darts *10 points per dart = 180 points.

32 darts *5 points per dart= 160 points.

180 points +160 points =340 points.