Question

Probability of getting 2 balls of black colour from a box containing 3 red and 4 black balls is ?

Answer 1

Answer:1/3

Step-by-step explanation:

total outcome are RB,RR,BB

favourable outcome = RR

therefore probability= 1/3                  

Answer 2

Answer:

Step-by-step explanation:

if the balls are drawn at the same time then

P(2 black balls) = 2 / 7.