Clothing dan has 4 pairs of white socks 5 pairs of black socks, and several pairs of blue socks. has 12 pairs of socks altogether. How many pairs of blue socks does have? Write the ratio of the number of pairs of socks to the number of pairs of blue socks. has 3 pairs of blue socks. The ratio of the number of pairs of socks to the number of pairs of blue socks is