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If 'P' means 'minus', 'Q' means 'multiply', 'R' means 'divide', 'S' means 'plus', then 10 Q 5 R 2 S 3 P 1 = ?
25
27
28
30
27
Apply BODMAS rule immediately after replacing symbols with mathematical operators to avoid calculation order errors.
Apply BODMAS rule immediately after replacing symbols with mathematical operators to avoid calculation order errors.
Symbol Substitution
Given the operators: Q = Multiply (*), R = Divide (/), S = Plus (+), P = Minus (-). The expression 10 Q 5 R 2 S 3 P 1 becomes 10 * 5 / 2 + 3 - 1.
BODMAS Calculation
Follow the order: Divide, Multiply, Add, Subtract. First, 5 / 2 = 2.5. Then, 10 * 2.5 = 25. Next, 25 + 3 = 28. Finally, 28 - 1 = 27.
A: 25 is incorrect as it fails to account for the correct BODMAS order. C: 28 is incorrect as it misses the final subtraction step. D: 30 is incorrect due to calculation errors in the multiplication/division sequence.
B is correct because replacing the symbols and applying the BODMAS rule (Division, Multiplication, Addition, Subtraction) yields the result of 27.
Always perform division before multiplication in expressions where they appear together, even if multiplication appears first in the string.
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