Sarah, Fatima, Salma, and Lina all got tips during their waitressing shift. The average of Sarah, Fatima, and Salma's tips was $100. The average of Fatima, Salma, and Lina's tips was $90. If Lina earned $85, what did Sarah earn?
Choose the correct option:
A) 105
B) 108
C) 110
D) 113
E) 115
To solve:   Average tips for Sarah, Fatima and Sarah = $100   Total tips = 3*100= 
<gadget id="calculator">3*100</gadget>
<output>300</output>
300   Average tips for Fatima, Salma, and Lina= $90   Total tips = 3*90= 
<gadget id="calculator">3*90</gadget>
<output>270</output>
270   Lina's tips= $85   Now,   (Sarah+Fatima+Salma) - (Fatima+Salma+Lina) = 300-270= 
<gadget id="calculator">300-270</gadget>
<output>30</output>
30   Sarah-Lina= 30   Sarah = Lina +30 = $115   Answer: Option 115
<result>E</result>
Sarah, Fatima, Salma, and Lina all got tips during their waitressing shift. The average of Sarah, Fatima, and Salma's tips was $100. The average of Fatima, Salma, and Lina's tips was $90. If Lina earned $85, what did Sarah earn?