In a competition, a school awarded medals in different categories. 36 medal in dance, 12 medals in

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Question:

In a competition, a school awarded medals in different categories. 36 medal in dance, 12 medals in dramatics and 18 medals in music. If these medals went to a total of 45 persons and only 4 person got medals in all the three categories, how many received medals in exactly

(i) two of these

categories,

(ii) one of these

categories?