Probability?

You have 9 pieces of wood of different lengths that you are attempting to glue together that will have a length of exactly 10 inches. The wood lengths

You have 9 pieces of wood of different lengths that you are attempting to glue together that will have a length of exactly 10 inches. The wood lengths are 1 inch, 2 inches, 3 inches, 4 inches, 5 inches, 6 inches, 7 inches, 8 inches, and 9 inches. What is the probability that you randomly choose one piece of wood keep it then randomly choose the second one to give you a total length of 10 inches.

Explain how you arrived at the above probabilities.

or:You have 9 pieces of wood of different lengths that you are attempting to glue together that will have a length of exactly 10 inches. The wood lengths are 1 inch, 2 inches, 3 inches, 4 inches, 5 inches, 6 inches, 7 inches, 8 inches, and 9 inches. What is the probability that you randomly choose one piece of wood keep it then randomly choose the second one to give you a total length of 10 inches. Explain how you arrived at the above probabilities.

or:1+9=102+8=103+7=104+6=10Eight valid choices, one invalid choice. Probability on the first choice is 8/9.One valid choice out of the remaining 8, so probability is 8/9 x 1/8 = 1/9 = 0.111

Tags:wood,probability,