How do you do this..
A bag contains 4 yellow balls and "n" red balls. Two balls are drawn without replacement. Which expression represents the probability that one ball is yellow and ball is red?
P.S. the answer is (4/n+4)(n/n+3) + (n/n+4)(4/n+3)
A bag contains 4 yellow balls and "n" red balls. Two balls are drawn without replacement. Which expression represents the probability that one ball is yellow and ball is red?
P.S. the answer is (4/n+4)(n/n+3) + (n/n+4)(4/n+3)
hello!
I'm new on this forum. I am currently building a paper rocket.
Just a question (if you can please help): how much weight do you think spray paint or permanent marker will add to the paper rocket?
Thanks in advance,