Given gumball machine contains blue, pink, white and green gumballs. in the machine 50% of the gumballs are blue 10% are pink, 20% are white and 20% are green.
Event A is representing Jane turning the knob of the gumball machine and a blue gumball dropping out .We need to find complement of A.The Complement of an event is all outcomes that are NOT the event .Here complement of the event A are dropping of Pink ,white and green gumballs.