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6. Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg. | |

A. 2 : 3 | B. 4 : 3 |

C. 3 : 2 | D. 3 : 4 |

Answer: Option A

Explanation:

CP of 1kg 1st kind rice = Rs.7.20

CP of 1kg 2nd kind rice = Rs.5.70

CP of 1kg mixed rice = Rs.6.30

By rule of alligation,

CP of 1kg 1st kind rice | CP of 1kg 2nd kind rice | |||||||||

7.2 | 5.7 | |||||||||

Mean Price | ||||||||||

6.3 | ||||||||||

6.3 - 5.7 = .6 | 7.2 - 6.3 = .9 |

Required Ratio = .6 : .9 = 6:9 = 2:3

Jay

2013-07-28 13:21:14

How is it 3 : 2, pl give the steps

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Abiram

2013-07-28 18:33:25

the formula is the cheaper price comes first and then followed by the costly one

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Hanumanda

2013-07-31 07:51:03

You can use in both ways. If you use as you said,

**CP of 1Kg 2nd kind rice (5.7) CP of 1Kg 1st kind rice(7.2)**

Mean(6.3)

7.2-6.3 =0.9 6.3-5.7=0.6

i.e., 2^{nd} kind rice : 1^{st} kind rice = 0.9 : 0.6 = 3 : 2

or, required ratio = 1^{st} kind rice: 2^{nd} kind rice = 2 : 3

Mean(6.3)

7.2-6.3 =0.9 6.3-5.7=0.6

i.e., 2

or, required ratio = 1

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