In a bag, there are 10 black plastic chips, 7 yellow, 5 red, and 3 green.
Total number of chips = 10+ 7 + 5 + 3 = 25
Probability = [tex]\frac{Number \ of \ particular \ chips}{total \ number \ of \ chips}[/tex]
Probability ( back drawn) = [tex]\frac{10}{25}}[/tex]
Two chips are drawn at random with replacement.. So black is replaced
Probability ( red drawn) = [tex]\frac{5}{25}}[/tex]
Probability (black, then red) = [tex]\frac{10}{25}}[/tex] * [tex]\frac{5}{25}}[/tex]
= [tex]\frac{50}{625}}[/tex]= [tex]\frac{2}{25}}[/tex]
