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In a farm Wambui had goats, sheep and cows in the ratio 5:3:2. At the beginning, she had 50 animals but later sold some of them leaving her with 36. If the number of goats, sheep and cows that remained were in the ratio 2:1:1, how many sheep did he sell?
A. 14
B. 6
C. 9
D. 15