Spoints A bag contains 10 blue marbles, 7 red marbles, 2 white marbles and 1 black marble. A marble is chosen. Without replacing the first marble, another marble is chosen. What is the
probability both marbles are blue?

I dont know if I did the correct because it's been a while

Step-by-step explanation:

10 blue

7 red

2 white

1 black

10+7+2+1= 20 marbles in total

100÷20=5% each marble

5×10= 50% chance blue

5×7= 35% chance red

5×2= 10% chance white

5×1= 5% chance black

linear pair postulates