Question

the average number of cars sold by an automobile dealer in six month is 100 if he sold 120,80,110,80,90cars in first five months how many cars were sold iby him in sixth month​

Answer 1

1. (120+80+110+80+90+x)/6 =100
2. (480+x)/6=100
3. 480+c=100×6
4. 480+x=600
5. x=600-480
6. x=120

Answer 2

120+80+110+80+90/5=480/5=96