Question

In a box there are 6 beads and 4 green beads. In another box there are 7 blue beads and 3 green beads. From each box 1 is taken.what is the probability of both being same in colour,

Answer 1

Answer:

25,13

Step-by-step explanation:

First box contains 8 black and 12 white beads Second box contains 9 black and 6 white beads.

(a) One black bead from each box is taken.

Number of such cases = 8×9=72

Total number of possibilities = 20×15=300

Probablity of getting both black beads =  

300

72

​  

=  

25

6

​  

 

(b) One black and one white bead is taken.

So if one black bead is taken from first box then one white bead is taken from second box and if one white bead is taken from first box then one black bead is taken from second box.

Number of such cases = 8×6+12×9=48+108=156

Total number of possibilities = 20×15=300

Probablity of getting one black and one white bead =  

300

156

​  

=  

25

13

​