Answer:

Step-by-step explanation:
Probability of first yellow ball
Since first ball is again placed in the bag
Probability of second yellow ball
These two are independent events so the probability of both yellow balls=
Answer:
1, -1, -3
Step-by-step explanation:
6(x+x+2+x+4)=-18
6(3x+6)=-18
18x+36=-18
18x=-54
x=-3
so x=-3, x+2=-1, and x+4=1
The first statement is false, the second statement is true :)
2 groups of 9
3 groups of 6
6 groups of 3
9 groups of 2