You Have Arranged to Go Camping for Two Days in March.You

question 184

Multiple Choice

You have arranged to go camping for two days in March.You believe that the probability that it will rain on the first day is 0.4.If it rains on the first day,the probability that it also rains on the second day is 0.5.If it doesn't rain on the first day,the probability that it rains on the second day is 0.3.Let the random variable X be the number of rainy days during your camping trip.Find the standard deviation of X.

• A)σ = 0.67
• B)σ = 0.76
• C)σ = 0.57
• D)σ = 0.77
• E)σ = 0.70

---

Definitions:

Logical Principle

Fundamental concepts or assumptions that underpin reasoning and logical analysis, serving as the basis for deductions and conclusions.

Body Mass Index (BMI)

A measure of body fat based on an individual's weight in relation to their height, used to categorize underweight, normal weight, overweight, and obesity.

Overweight

Having more body weight than is considered normal or healthy for one's age, height, and body type.

Cognitive Development

The process by which a child learns to reason, solve problems, and think consciously as they grow older.