67. 2100 consists of some notes of 200 notes are half of 50 and the number of 50 notes. If 12 notes are of 100, then find the tota

67. 2100 consists of some notes of 200 notes are half of 50 and the number of 50 notes. If 12 notes are of 100, then find the total number of notes. (1) 21. (3) 19 (2) 18 (4) 15​

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