Albinism is recessive trait so you need both genes(homozygous recessive) to develop it. If both of the parent is heterozygous the genotype of the children would be:
25% homozygous dominant(normal)
50% heterozygous (normal)
25% homozygous recessive(albino)
You can conclude that there is 25% or 1/4 chance of the offspring become albino while 3/4 chance they become normal. Assuming the order of the offspring is important, the chance would be:
albino * normal * normal * albino * normal= 1/4 * 3/4 * 3/4 * 1/4 * 3/4= 27/1024
