Question : Directions: In the following question, you have to identify the correct response from the given premises stated according to the following symbols.
If × stands for ÷, ÷ stands for +, + stands for –, – stands for × then what is the value of (30 + 20) – 5(7 ÷ 3) × 25 = ?
Option 1: 100
Option 2: 10
Option 3: 20
Option 4: 25
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Correct Answer: 20
Solution :
Given:
× stands for ÷, ÷ stands for +, + stands for –, – stands for ×
(30 + 20) – 5(7 ÷ 3) × 25 = ?
On replacing the mathematical signs according to the instructions given, we get –
= (30 – 20) × 5(7 + 3) ÷ 25
= 10 × 5(10) ÷ 25
= 10 × 50 ÷ 25
= 10 × 2
= 20
Therefore, the required answer is 20. Hence, the third option is correct.
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