12 A box contains 5 blue balls, 3 black balls and 2

red bals of the same size. A ball is selected at

random from the box and then replaced. A second

ball is then selected Find the probability of

obtaining (a) two red balls. (b) two blue balls or

w black basic) one black ball and one red

palany order

Question

Heaven Todd

Mathematics

2 March, 19:40

12 A box contains 5 blue balls, 3 black balls and 2

red bals of the same size. A ball is selected at

random from the box and then replaced. A second

ball is then selected Find the probability of

obtaining (a) two red balls. (b) two blue balls or

w black basic) one black ball and one red

palany order

+2

Answers (1)

Know the Answer?

Todd Harvey · Answer 1

R = red, B=blue, Bl=black

(a) p (R) X p (R) = 2/10 X 2/10 = 4/100 = 1/25

(b) p (B) X p (B) = 5/10 X 5/10 = 25/100

+ +

p (Bl) X p (R) = 3/10 X 2/10 = 6/100 = 37/100

+ +

p (R) X p (Bl) = 2/10 X 3/10 = 6/100

12 A box contains 5 blue balls, 3 black balls and 2red bals of the same size. A ball is selected atrandom from the box and then replaced. A secondball is then selected Find the probability ofobtaining (a) two red balls. (b) two blue balls orw black basic) one black ball and one redpalany order