A normal distribution has mean μ and standard deviation σ. An x-value is randomly selected from the distribution. Find P (μ − 3σ ≤ x ≤ μ)

49.85%

Step-by-step explanation:

P(μ − 3σ ≤ x ≤ μ)

= ½ P(μ − 3σ ≤ x ≤ μ + 3σ)

= ½ (99.7%)

= 49.85%

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.