Question

There is a bag filled with 4 blue, 3 red and 5 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 different colours?

Answer 1

Answer:

no of possible outcome = 4+3+5

=12 .

no of favourable outcome of 2 colour = no . of blue marble +no . of green marble

= 4+5

= 9 .

probability = no . of favourable outcomes/ no. of possible outcome

= 12/9

= 4/3 .