 
<translate> Da farko, muna bukatar mu san yawan kuɗin dukan abincin kafin mu iya sanin abin da za mu ba da. Mun yi 10 + 20 + 30 = $60 na abinci. Yanzu muna bukatar mu gano nawa ne jimlar tip da za a biya, ta hanyar ninka 60 *.2 = 12 dala a tip. Tun da yake suna so su raba wannan daidai tsakanin mutane uku, wannan yana aiki zuwa 12 / 3 = 4 daloli a tips da mutum. Amsar ita ce: 4. <eng> 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. 