engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Probability Multiplication Theorem of Events
A jar contains b blue marbles, r red marbles, and g green marbles. If two marbles are to be taken from the jar one at a time, then what is the probability that the first marble is blue and the second marble is red?
1
\(\rm \dfrac {br}{(b+r+g)^2-1}\)
2
\(\rm \dfrac {br}{(b+r+g)^2}\)
3
\(\rm \dfrac {br}{(b+r+g)^2-(b+r+g)}\)
4
\(\rm \dfrac {b+r}{b+r+g}\)