Question 284285
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Certainly the answer of $1200 that you got for the total value must be wrong, since A sold part of his share to B for $1200.  But since the correct answer is $12,000, perhaps your work was okay but you got the decimal point in the wrong place.<br>
Initially, A owned 60%; after he sold some to B, the two had equal shares, so A now owned 50%.<br>
That means 10% of the value traded hands, and the amount of that transaction was $1200.  Since 10% is one-tenth of the total, the total value is $12,000.<br>
ANSWER: $12,000<br>