Respuesta :
D- 1/4
The probability of Blue shirt blue socks is 1/4 * 1/2 = 1/8
Add this to the same probability of black and black =2/8 = 1/4
The probability of Blue shirt blue socks is 1/4 * 1/2 = 1/8
Add this to the same probability of black and black =2/8 = 1/4