The answer would be B because in the question it says the price tripled (3x) and that it rose another $0.75 (+0.75). It also says at least $4.50, meaning it could be 4.50 or more than 4.50. So, it's
Answer:
I believe the answer is C.
Step-by-step explanation:
Answer:
a)

For any integer k between 0 and 15, and 0 for other values of k.
b)

c) P(6 ≤ X ≤ 10) = 0.2737
d) μ = 15*0.75 = 11.25. σ² = 11.25*0.25 = 2.8125
Step-by-step explanation:
X is a binomial random variable with parameters n = 15, p = 0.75. Therefore
a)

For any integer k between 0 and 15, and 0 for other values of k.
b)
P(X>10) = P(X=11) + P(X=12)+ P(X=13)+P(X=14)+P(x=15)





Thus,

c) P(6 ≤ X ≤ 10) = P(X = 6) + P(X = 7) + P(X = 8) + P(X=9) + P(X=10)





Thereofre,

d) μ = n*p = 15*0.75 = 11.25
σ² = np(1-p) = 11.25*0.25 = 2.8125
Answer:
Plan B
Step-by-step explanation:'
First u have to divide each one to see how much each piano lesson costs.
Plan A- 31.50/6=5.25
Plan B- 20.60/4=5.15
So since Plan B is less then Plan B would be the answer.
(Brainliest Plz)
Answer:
$8.25 y(cost) = 5.50(x pounds coffee) - 2.75
Step-by-step explanation:
5.50 × 2
11 - 2.75
$8.25
y=5.50x-2.75