Answer:
a) 80%
80/100 *100 = 80%
b) 10 %
Sorry not able to draw a venn diagram
smartphone 50
both 30
tablet 10
10 people 10/100 *100 = 10%
No, because something extra is being added/divided and there are too many variables on one side
72.1
Brainliest please I’m tryna rank up