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A number is chosen from 1, 2, . . . with probability?

2) 1/2
3) 1/3
4) 1/4

1 Answer

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Final answer:

The question involves understanding probability in mathematics, which assesses the likelihood of an event occurring. The use of product and sum rules can calculate combined chances in genetics or coin tosses. Sampling methods in surveys employ probabilities to ensure unbiased data collection.

Step-by-step explanation:

The question is asking about probability, which is a mathematical tool used to study randomness. It is dealing with the chance that an event will occur. Looking at a simple approach, if we know that the probability of tossing a coin once and getting heads is 1/2, tossing it a second time independently will also have a probability of 1/2. Using the product rule, the combined probability of getting two heads in two tosses is ½ × ½ = 1/4.

Similarly, the probability of obtaining at least one dominant trait in an experimental procedure involving genetics can be calculated by using the sum rule and product rule of probabilities. For instance, the chances of at least one dominant trait in a dihybrid cross can be calculated as (1/4 × 3/4) + (3/4 × 1/4) = 3/16 + 3/16 = 6/16, which simplifies to 3/8.

When it comes to surveys or experimental gathers of data, various techniques such as random number generation or systematic sampling (as in polling every tenth person) are used to ensure unbiased results. Overall, the concept of probability has vast applications across different types of scenarios, and understanding how to calculate it is key to many fields within mathematics and science.

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