Question

Tricky Probability Question:

A bag consists of 1 red marble and 4 green marble. If two marbles are drawn successively without replacement, what is the probability of getting red one??

Answer 1

why is this tricky?

Answer 2

because two draws one marble

Answer 3

\[1-\frac{4}{5}\times \frac{3}{4}\]

Answer 4

8/20 = 2/5

Answer 5

i get \(\frac 2 5\)

Answer 6

you solved by calculating the probability of getting green marble

Answer 7

i solved it by calculating the probability of not getting the red one and subtracting the result from 1

Answer 8

tricky answer ... than you

Answer 9

you could also compute \(\frac{1}{5}\times \frac{4}{4}+\frac{4}{5}\times \frac{1}{4}=\frac{1}{5}+\frac{1}{5}=\frac{2}{5}\)

Answer 10

ya that also is