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Q.

In what proportion must wheat at price Rs. 4.10 per kg must be mixed with wheat at price Rs. 4.60 per kg, so that the mixture be worth Rs. 4.30 a kg? 

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a

3 : 2 

b

2 : 3 

c

3 : 4 

d

4 : 3  

answer is A.

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Detailed Solution

Let a kgs of wheat at price Rs. 4.10 per kg is mixed with b kgs of  wheat at price Rs. 4.60 per kg is mixed 

total weight of wheaat= a+b price of the total quantity=4.3 per kg

a4.10+b4.6=a+b4.3

0.3b=0.2a ab=32

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In what proportion must wheat at price Rs. 4.10 per kg must be mixed with wheat at price Rs. 4.60 per kg, so that the mixture be worth Rs. 4.30 a kg?