प्रति प्रश्न समय कैलकुलेटर — सूत्र
## How to Calculate Guessing Penalty Impact
When a test penalizes wrong answers, random guessing has an expected value.
### Formula
**Expected Gain = Guesses x (P(correct) x 1 - P(wrong) x Penalty)**
Where P(correct) = 1 / Number of Choices
If the penalty equals 1/(choices-1), guessing has zero expected value.
When a test penalizes wrong answers, random guessing has an expected value.
### Formula
**Expected Gain = Guesses x (P(correct) x 1 - P(wrong) x Penalty)**
Where P(correct) = 1 / Number of Choices
If the penalty equals 1/(choices-1), guessing has zero expected value.
हल किया गया उदाहरण
A student randomly guesses on 10 questions with 4 choices each and a 0.25 penalty.
- P(correct) = 1/4 = 0.25
- P(wrong) = 3/4 = 0.75
- Expected gain per guess = 0.25 x 1 - 0.75 x 0.25 = 0.25 - 0.1875 = 0.0625
- Total expected gain = 10 x 0.0625 = 0.625 points