Correct option is B
Given: If '-' means, '÷', '+' means ‘×’, '÷' stands for '-' and ‘×' means '+'
From Option A.) 20+3-9÷5×2=20
If '-' means, '÷', '+' means ‘×’, '÷' stands for '-' and ‘×' means '+'
then modified equation will be:
20×3÷9-5+2=20
20×0.33-5+2=20
6.6-5+2=20
8.6-5=20
3.6≠ 20 (not follow)
From Option B.) 20-3+9×5÷2=63
If '-' means, '÷', '+' means ‘×’, '÷' stands for '-' and ‘×' means '+'
then modified equation will be:
20÷3×9+5-2=63
6.67×9+5-2=63
60+5-2=63
65-2=63
63=63 (Follows)
From Option C.) 20×3÷9-5+2=32
If '-' means, '÷', '+' means ‘×’, '÷' stands for '-' and ‘×' means '+'
then modified equation will be:
20+3-9÷5×2=32
20+3-1.8×2=32
20+3-3.6=32
23-3.6=32
19.4≠32 (not follow)
From Option D.) 20÷3×9+5-2=50
If '-' means, '÷', '+' means ‘×’, '÷' stands for '-' and ‘×' means '+'
then modified equation will be:
20-3+9×5÷2=50
20-3+9×2.5=50
20-3+22.5=50
42.5-3=50
39.5≠50 (not follow)
Thus, Option B is the correct answer.
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