Q6. 
Seats for Mathematics, Physics and Biology in a school are in the ratio $5:7:8$. There is a proposal to increase these seats by $40\%$, $50\%$ and $75\%$ respectively. What will be the ratio of increased seats? 
A.  $2:3:4$ 

B.  $6:7:8$ 

C.  $6:8:9$ 

D.  None 
Q7. 
A sum of Rs. 36.90 is made up of 180 coins which are either 10 paise coins or 25 p coins. The number of 10 p coins is: 
A.  48 

B.  54 

C.  56 

D.  60 
Q8. 
The salaries A, B, C are in the ratio $2:3:5$. If the increments of $15\%$, $10\%$ and $20\%$ are allowed respectively in their salaries, then what will be new ratio of their salaries? 
A.  $3:3:10$ 

B.  $10:11:20$ 

C.  $23:33:60$ 

D.  Cannot be determined 
Q9. 
The ratio of the number of boys and girls in a college is $7:8$. If the percentage increase in the number of boys and girls be $20\%$ and $10\%$ respectively, what will be the new ratio? 
A.  $8:9$ 

B.  $17:18$ 

C.  $21:22$ 

D.  Cannot be determined 
Q10. 
If $40\%$ of a number is equal to twothird of another number, what is the ratio of first number to the second number? 
A.  $2:5$ 

B.  $3:7$ 

C.  $7:3$ 

D.  $5:3$ 