Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q21. |
|
| 1) | 3:5 | 2) | 1:1 |
| 3) | 4:5 | 4) | D.I |
| 5) | None of these | ||
Answer : 1:1
Explanation :
Explanation :
With the help of alligation method :
50 40
45
45 - 40 = 5 50 - 45 = 5
So, final ratio = 5 : 5 = 1 : 1
View AnswerQ22. |
|
| 1) | 37years | 2) | 30years |
| 3) | 47 years | 4) | 57 years. |
| 5) | None of these | ||
Answer : 47 years
Explanation :
Explanation :
Total age of 30 boys = 3016 = 480
After teacher's join, total age = 3117= 527
Teacher's age = 527- 480 = 47 years.
Shortcut Method :
(311) + 16 = 47 years.
View Answer