Question

Help me get and explain how i do this

Answer 1

1/78

Explanation:

6 brown + 5 blue + 2 orange marbles = 13 marbles

P (orange1) = number of orange / total

= 2/ 13

Now we keep the marble

6 brown + 5 blue + 1 orange marbles = 12 marbles

P (orange2) = number of orange / total

= 1/ 12

P (orange, keep, orange) =P(orange1) + P( orange2)

2/13*1/12 = 2/156 = 1/78