Math Problem Statement

A baseball player strikes out 45% of the time. What is the probability that they will not strike out after being up at bat 3 times in a row?

Solution

Let’s solve this problem step by step:

Problem Breakdown:

  • The probability of striking out is 45%, or 0.450.45.
  • The probability of not striking out is: P(Not Strike Out)=10.45=0.55P(\text{Not Strike Out}) = 1 - 0.45 = 0.55
  • The player is up at bat 3 times in a row, and we want the probability that they will not strike out in all 3 at-bats.

Calculation:

For each at-bat, the events are independent, meaning the probability of not striking out remains the same each time. Thus, the probability of not striking out 3 times in a row is: P(Not Strike Out 3 Times)=P(Not Strike Out)3=0.553P(\text{Not Strike Out 3 Times}) = P(\text{Not Strike Out})^3 = 0.55^3

Compute 0.5530.55^3:

0.553=0.55×0.55×0.55=0.1663750.55^3 = 0.55 \times 0.55 \times 0.55 = 0.166375

So, the probability is approximately: 16.6%16.6\%

Final Answer:

The correct choice is 16.6%.


Would you like a more detailed explanation of any step? Let me know!

Related Questions:

  1. What is the probability of striking out all 3 times in a row?
  2. How would the probability change if the strikeout rate was 30% instead of 45%?
  3. What is the probability of not striking out exactly 2 times in 3 at-bats?
  4. If the player has 10 at-bats, what is the probability of striking out fewer than 3 times?
  5. How can this problem be visualized using a probability tree?

Tip:

When solving probability questions involving repeated independent events, always raise the single-event probability to the power of the number of repetitions.

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Math Problem Analysis

Mathematical Concepts

Probability
Independent Events

Formulas

P(Not Strike Out) = 1 - P(Strike Out)
P(Not Strike Out 3 Times) = P(Not Strike Out)^3

Theorems

Rule of Independent Probability

Suitable Grade Level

Grades 9-12