Let (a+bx+cx²)10 = $ \sum_{i=0}^{20} $ pixi, a,b,c∈N. If p1=20 and P₂ = 210, then 2(a+b+c) is equal to

If probability of happening of an event is 57%, then probability of non-happening of the event is
Which one of the following graphs accurately represents the plot of partial pressure of CS₂ vs its mole fraction in a mixture of acetone and CS₂ at constant temperature?
