Question

A bag contains white,black&rwd balls only.A balls is drawn at random from the bag If the probability of getting a white ball is3/10& thar of a black ball is2/5 then find the probability of getting ared balls .If bag contains 20 balls ,then find the total number of balls in the bag

Answer 1

mark me as brainlist
9/20 is the probability of red ball
20 balls in the bag