Answer:
[tex]\frac{10}{12}[/tex]
Step-by-step explanation:
The total number of card that the box has is (4 +6 + 2) = 12.
One card is needed to be choosen.
From 12 cards 1 can be chosen in 12 different ways.
If we remove the blue cards, then the box contains (4 + 6)= 10 cards.
From these 10 cards, where there is no blue card, one card can be chosen in 10 ways.
Hence, the probability of not getting blue is [tex]\frac{10}{12}[/tex]