What is the expected value of a stock investment of $20,000 that has a 25% chance of decreasing to a value of $18,000, a 25% chance of maintaining a value of $20,000, and a 50% chance of increasing to a value of $25,500?

x/3-10=8

x/3=18

x=48

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

i need more details sorry

step-by-step explanation: