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Problem-Solving By Substitution
Interchange Of Signs And Numbers

Using the symbols where '?' means subtraction, '†' means addition, '‡' means multiplication, and '§' means division, find the value of 10 † 5 ? 3 ‡ 2 § 1.

Answer: B. 14
10 + 5 - 3 × 2 ÷ 1 = 15 - 6 = 9.
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