Answer to Question #111187 in Statistics and Probability for Nimra

Question

A bag contains three red and four black balls. A balls is drawn at random from the black what is the probability that the ball is black?

Answer 1

P(A​)=Probability of drawing a black ball

N1=4 - number of black balls in the bag

N2=3 - number of red balls in the bag

P(A)=N1/(N1+N2)=4/7=0.57

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