Question : Directions: After interchanging the given two numbers what will be the values of equations (I) and (II) respectively? 8 and 4 I. 8 – 4 × 6 ÷ 3 + 7 II. 8 × 3 – 6 ÷ 2 + 4
Option 1: –5 and 20
Option 2: –4 and 18
Option 3: –5 and 17
Option 4: 20 and 18
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Correct Answer: –5 and 17
Solution : Given: I. 8 – 4 × 6 ÷ 3 + 7 II. 8 × 3 – 6 ÷ 2 + 4
On interchanging 8 and 4 in the above equations we get – Equation I: 4 – 8 × 6 ÷ 3 + 7 = 4 – 8 × 2 + 7 = 4 – 16 + 7 = –5 Equation II: 4 × 3 – 6 ÷ 2 + 8 = 4 × 3 – 3 + 8 = 12 – 3 + 8 = 17
So, the values are –5 and 17 respectively for equations (I) and (II). Hence, the third option is correct.
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