 <translate> First, we need to determine how much the entire meal costs before we can determine the tip. We perform 10 + 20 + 30 = 60 dollars worth of food. Now we need to find out how much the total tip to be paid is, by multiplying 60 * .2 = 12 dollars in tips. Since they want to split this evenly amongst three people, this works out to 12 / 3 = 4 dollars in tips per person.
The answer: 4. <yor> Lákọ̀ọ́kọ́ ná, a gbọ́dọ̀ mọ iye tí gbogbo oúnjẹ náà ná wa ká tó lè mọ iye tí wọ́n máa fúnni. A ṣe 10 + 20 + 30 = 60 dọ́là iye oúnjẹ. Ní báyìí, a ní láti mọ iye tí a ó san, nípa gbígbé 60 *.2 = 12 dọ́là ní owó orí. Níwọ̀n bí wọ́n ti fẹ́ pín owó yìí ní ìlọ́po-ìlọ́po láàárín àwọn èèyàn mẹ́ta, èyí á mú kí 12 / 3 = 4 dọ́là owó ẹ̀bùn fún ẹnì kọ̀ọ̀kan. Ìdáhùn náà ni pé: 4. 