| The ratio of students in school A, B and C is 5: 4: 7, respectively. If number of students in schools are increased by 20%, 25% and 20% respectively, then what will be the ratio of students in school A, B and C, respectively? |
| [Syndicate Bank (Clerk) 2010] |
A) 5: 5: 7
B) 30: 25: 42
C) 30: 20: 49
D) Cannot be determined
E) None of the above
Correct Answer: B
Solution :
| Here, ratio of students in school, |
| A: B: C = 5: 4: 7 |
| New ratio \[=5\times \frac{120}{100}:4\times \frac{125}{100}:7\times \frac{120}{100}\] |
| \[=600:500:840\] |
| \[=30:25:42\] |
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