Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q31. 

1)  285.71%  2)  283.71% 
3)  289.91%  4)  285.71% 
5)  None of these 
Answer : 285.71%
Explanation : Let ‘x’ be the number
Explanation : Let ‘x’ be the number
(35/100)x = 175
or x= (175 x 100)/35
So,required percentage = (500/75)/100 = 285.71%
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Q32. 

1)  200  2)  240 
3)  240  4)  500 
5)  None of these 
Answer : 200
Explanation :
Explanation :
Let, the full mark be x.
The first candidate's pass mark = (25/100)x +30
The second candidate's pass mark = ( 50/100 )x20
So, (25/100)x +30 = ( 50/100 )x20
Or x= 200
Shortcut Method :
FullMark = (Diff. in marks / diff.in %) x 100
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Q33.  In an election between two candidates, one got 55% of the total valid votes, 20% of the votes were invalid. If the total number of votes was 7500, the number of valid votes that the other candidate got, was: 
1)  2500  2)  2600 
3)  2700  4)  3000 
5)  None of these 
Answer : 2700
Explanation :
Explanation :
Number of valid votes = 80% of 7500 =
6000.
So, Valid votes polled by other candidate
= 45% of 6000
= (45/100 x 6000 = 2700.
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