There is a 20 percent chance Angela will pull a red scarf, 60 percent chance she will pull a black scarf and 20 percent chance she will pull a white scarf. So if she pulls a red scarf then there will be a 18 percent chance she will pull a white scarf after. I Hope this helps!
I believe there is a 20 percent chance because there is 2/10 fraction for a red scarf and a 2/10 for a white scarf which equals 4/20 which is equal to 1/5 which is equal to 20%
120=x+y and 10=.05x+.10y 120-x=y then subsitute 10=.05x+.10(120-x) distruibte and solve you can do it feel free to go off of my math. x(nickels) y(dimes)