Answer :

Given:

Red Balls = 3


White Balls = 5


Total number of balls = Red Balls + White Balls


Total number of balls = 3 + 5


Total number of balls = 8


One ball can be chosen in 8 ways


Total number of elementary events = 8


there are 5 black (not red) balls


one can be chosen 1 black (not red) ball can be chosen in 5 ways


i.e., Favourable number of elementary events = 5





Hence, probability that the drawn ball is not red


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