Bank Exam Ratio, Proportion & Mixture – Page 6 (Premium Guide)
Concept • Alligation Method • Fast Calculation • Exam Strategy
Core Concepts
Ratio: a : b
Proportion: a : b = c : d
a / b = c / d
Ratio Conversion
a : b → a/(a+b), b/(a+b)
Convert ratio to percentage easily
Practice Questions (Ratio)
Q1. Ratio 2 : 3, total = 500
Total parts = 5
1 part = 100
A = 200, B = 300
Q2. Ratio 3 : 5, total = 400
A = 150, B = 250
Q3. A : B = 4 : 1
A = 80%, B = 20%
Q4. Ratio 7 : 3
A = 70%, B = 30%
Q5. A : B = 5 : 5
= Equal (50% each)
Proportion Practice
Q6. 2 : 3 = x : 12
2 × 12 = 3x
x = 8
Q7. 4 : 5 = x : 20
x = 16
Q8. 3 : 7 = 9 : x
x = 21
Q9. 5 : 8 = x : 40
x = 25
Q10. 6 : 9 = x : 18
x = 12
Mixture (Alligation Method)
Cross Difference Method
Q11. Mix 20% and 40% to get 30%
40 − 30 = 10
30 − 20 = 10
Ratio = 1 : 1
Q12. Mix 10% and 30% to get 20%
Ratio = 1 : 1
Q13. Mix 30% and 50% to get 40%
Ratio = 1 : 1
Q14. Mix 20% and 50% to get 30%
50 − 30 = 20
30 − 20 = 10
Ratio = 1 : 2
Q15. Mix 40% and 70% to get 50%
Ratio = 1 : 2
Topper Tips
- Always convert ratio into total parts
- Use cross multiplication in proportion
- Apply alligation for mixture problems
- Make common terms equal
Exam Strategy
- Solve ratio questions within 10–15 seconds
- Use percentage conversion for speed
- Apply alligation directly without calculation
Final Tip
Convert → Compare → Apply → Solve Fast
No comments:
Post a Comment