Which house and which planets in Vedic astrology need to be considered to predict success failures in competitive exams and job oriented exams?

3rd house represents exams. 6th house represents success through self efforts and 12th house represents failures. Mercury is the governing planet of knowledge, speech and writing.

So if 3rd house and mercury is connected with 6th house, one succeeds in competitive exams and if 3rd house is connected with 12th house it shows failure in the same.

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