In an Area Having Sandy Soil, 50 Small Trees of a Certain

question 4

Essay

In an area having sandy soil, 50 small trees of a certain type were planted, and another 50 trees were planted in an area having clay soil. Let X = the number of trees planted in sandy soil that survive 1 year and Y = the number of trees planted in clay soil that survive 1 year. If the probability that a tree planted in sandy soil will survive 1 year is .7 and the probability of 1-year survival in clay soil is .6, compute an approximation to $P ( - 6 \leq X - Y \leq 6 )$ (do not bother with the continuity correction).

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Definitions:

Total Production

The complete quantity of goods and services produced in an economy during a specific time period.

Constant Rate

A steady, unchanging value or speed at which something occurs or is applied over time.

Wine

An alcoholic beverage made from fermented grapes or other fruits, varying greatly in taste, strength, and quality based on production methods and origin.

Bread

A staple food made from flour and water, typically baked, that serves as a primary carbohydrate source in many diets worldwide.