What is the probability of guessing correctly at least 8 out of 10 answer on true-false examination?

Explanation

To find the probability of guessing correctly at least 8 out of 10 answers on a true-false examination, we can use the binomial probability formula. Here’s a step-by-step solution:

### Step 1: Identify the parameters
In a true-false examination, the probability of guessing correctly (success) for each question is:
- \( P = \frac{1}{2} \)
- The probability of guessing incorrectly (failure) is:
- \( Q = 1 - P = \frac{1}{2} \)

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