16.1.17) Lisa runs a local flower shop, if it rains on Valentine's Day and she opens the shop, she will lose $200. If it does not rain on Valentine's Day, she will earn $500 dollars as profits. The chance of rain is 30%, what is Lisa's gain from perfect information about weather conditions on the forthcoming Valentine's Day?

A) 50B) 60C) 90D) 150

Answer: B

16.1.18) Lisa runs a local flower shop, if it rains on Valentine's Day and she opens the shop, she will lose $200. If it does not rain on Valentine's Day, she will earn $500 dollars as profits. The chance of rain is 30%, the standard deviation of the profits Lisa could earn on Valentine's Day is

A) 198.17.B) 135.61.C) 432.43.D) 290.

Answer: A

Notes:

Please explain these answers. Thanks. Do not copy other solutions. I have them already.