Bank Exam Practice Material Series – Page 15
Probability Tricks, Speed Maths & Important Concepts
Learn Probability shortcut tricks, event calculation methods, dice and card concepts, and fast solving techniques for Bank Exams, SSC, Railways, Insurance, and Competitive Exams.
Importance of Probability
Probability is one of the most important arithmetic and reasoning topics in competitive exams. This topic helps students improve:
- Logical reasoning ability
- Analytical thinking
- Decision-making skills
- Calculation speed
- Problem-solving accuracy
Important Probability Concepts
- Basic Probability
- Favorable Outcomes
- Total Outcomes
- Dice Problems
- Card Probability
- Coin Toss Probability
Basic Probability Formula
Complementary Probability Formula
Speed Tricks for Probability
Dice Probability Trick
Find probability of getting an even number on a die.
Even numbers:
2, 4, 6
Favorable outcomes = 3
Total outcomes = 6
2Answer = 1/2
Coin Toss Trick
Find probability of getting Head.
Possible outcomes:
Head, Tail
Favorable outcome = 1
Total outcomes = 2
Answer = 1/2
Card Probability Trick
Find probability of drawing a King from a deck of cards.
Total Kings = 4
Total cards = 52
3Answer = 1/13
Important Fraction & Percentage Values
| Fraction | Percentage | Decimal | Probability Meaning |
|---|---|---|---|
| 1/2 | 50% | 0.5 | Equal Chance |
| 1/4 | 25% | 0.25 | Low Chance |
| 3/4 | 75% | 0.75 | High Chance |
| 1 | 100% | 1.0 | Certain Event |
Practice Questions
Question 1
Find probability of getting an odd number on a die.
Odd numbers:
1, 3, 5
Favorable outcomes = 3
Total outcomes = 6
Answer = 1/2
Question 2
Find probability of getting Tail in a coin toss.
Favorable outcome = 1
Total outcomes = 2
Answer = 1/2
Question 3
Find probability of drawing a Queen from a deck.
Queens = 4
Cards = 52
Answer = 1/13
Question 4
Find probability of getting number greater than 4 on a die.
Numbers:
5, 6
Favorable outcomes = 2
Total outcomes = 6
Answer = 1/3
Question 5
Find probability of impossible event.
Answer = 0
Important Exam Tips
- Memorize total outcomes carefully
- Practice dice and card problems daily
- Improve fraction simplification speed
- Use shortcut counting methods
- Focus on both accuracy and speed
Fast Formula Revision
| Topic | Formula |
|---|---|
| Probability | Favorable Outcomes / Total Outcomes |
| Complementary Probability | 1 − P(A) |
| Certain Event | Probability = 1 |
| Impossible Event | Probability = 0 |
| Equal Chance | Probability = 1/2 |
Daily Practice Strategy
- Practice 20 Probability questions daily
- Revise dice and card concepts regularly
- Improve fraction calculations
- Practice shortcut solving methods
- Focus equally on speed and accuracy
Bank Exam Practice Material Series
No comments:
Post a Comment