## Alligation

In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16.50 kg?

**Options:**

A. | 3 : 7 |

B. | 5 : 7 |

C. | 7 : 3 |

D. | 7 : 5 |

**Answer: Option C**

By the rule of alligation:

Cost of 1 kg pulses of 1^{st} kind = Rs.15

Cost of 1 kg pulses of 2^{nd} kind Rs.20

Main price = Rs. 16.50

So,Required rate = 3.50 : 1.50 = 7 : 3.

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