In an examination, a student’s average marks were 63. If he had obtained 20 more marks for his Geometry and 2 more marks for his Hindi, his average would have been 65. How many subjects did he appear in the examination?

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In an examination, a student’s average marks were 63. If he had obtained 20 more marks for his Geometry and 2 more marks for his Hindi, his average would have been 65. How many subjects did he appear in the examination?