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In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so that the mixture may be worth Rs.8 per Kg?
  • a)
    5 : 4
  • b)
    2 : 1
  • c)
    3 : 2
  • d)
    4 : 3
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so th...
By the rule of alligation, we have

Required ratio = 1.2 : .9 = 12 : 9 = 4 : 3
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Most Upvoted Answer
In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so th...
Given:
Cost of Rice A = Rs.7.10 per kg
Cost of Rice B = Rs.9.20 per kg
Cost of Mixture = Rs.8 per kg

Let the two types of rice be mixed in the ratio of x : y

So, the cost of the mixture = (7.10x + 9.20y)/(x+y)

As per the given condition, the cost of the mixture = Rs.8 per kg

Therefore, (7.10x + 9.20y)/(x+y) = 8

On solving this equation, we get x:y = 4:3

Hence, rice at Rs.7.10 must be mixed with rice at Rs.9.20 in the ratio of 4:3 to get a mixture worth Rs.8 per kg.

Therefore, the correct answer is option D) 4:3.
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In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so th...
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In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so that the mixture may be worth Rs.8 per Kg?a)5 : 4b)2 : 1c)3 : 2d)4 : 3Correct answer is option 'D'. Can you explain this answer?
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