 <translate> Average of 20 numbers = 0
Sum of 20 numbers = (0 * 20) = 0
It is quite possible that 19 of these numbers may be positive and if their sum is a, then 20th number is (-a). The final answer: (D). <yor> Ìpíndọ́gba àwọn iye 20 = 0 Àpapọ̀ àwọn iye 20 = (0 * 20) = 0 Ó lè jẹ́ pé 19 nínú àwọn iye yìí lè jẹ́ iye tó dára, tí iye wọn bá jẹ́ a, nígbà náà, iye ogún ni (-a). Ìdáhùn tó péye: (D). 