Answer:
0.024
Step-by-step explanation:
Given,
Red marbles = 4,
Green marbles = 7,
Total marbles = 4 +7 = 11,
Ways of choosing 3 marbles =[tex]^{11}C_3[/tex]
Ways of choosing 3 red marble = [tex]^4C_3[/tex]
Hence, the probability of 3 red marble = [tex]\frac{^4C_3}{^{11}C_3}[/tex]
[tex]=\frac{\frac{4!}{3!1!}}{\frac{11!}{3!8!}}[/tex]
[tex]=\frac{4}{165}[/tex]
≈ 0.024
