9r
Explanation:
4r + 9r = 13r
13r-11r = 2r
2r + 7r = 9r
Answer:
Step-by-step explanation:
Given
there are 50 winning number out of which 40 get $ 100 each and 10 wins $ 1000 .
let x denotes the winning from a randomly selected ticket


Expected value is given by


and Expected return is given by


Answer: -6=-4 or x=2,3
Step-by-step explanation: