Answer:
Step-by-step explanation:
Assuming a binomial distribution for the number of U.S. households that owned a computer in 2001. The formula for binomial distribution is expressed as
P(X = r) = nCr × q^(n - r) × p^r
Where
p = probability of success
q = probability of failure
n = number of sample
From the information given,
p = 56.5% = 56.5/190 = 0.565
q = 1 - p = 1 - 0.565 = 0.435
n = 3
We want to determine P(x greater than or equal to 1). This is also expressed as
1 - P(x lesser than or equal to 1)
P(x lesser than or equal to 1) = P(x = 0) + P(x =1)
P(x = 0) = 3C0 × 0.435^(3 - 0) × 0.565^0 = 0.082
P(x = 1) = 3C1 × 0.435^(3 - 1) × 0.565^1 = 0.32
P(x greater than or equal to 1) = 0.082 + 0.32 = 0.402
