Answer:
20%
Step-by-step explanation:
Ownership of XYZ Corp. in ABC Partnership = 100% of ABC Partnership * Percentage owned by XYZ Corp.
= 100% * 50%
= 50%
Ownership of Nancy = Interest in ABC Partnership + Ownership of XYZ Corp. in ABC Partnership * Interest of Nancy In XYZ Corp.
= 10% + (50% * 20%)
= 10% + 10% = 20%