Multiple choice

What approximate value should come in place of question mark (?) in the following question? 39.95% of 265 + 35.2% of 178 = 50% of ? +? % of 80

  1. 100

  2. 130

  3. 190

  4. 160

  5. 230
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Approximating: 39.95% of 265 ≈ 40% of 265 = 106. 35.2% of 178 ≈ 35% of 178 = 62.3. Sum = 168.3. Equation: 168.3 = 50% of ? + ?% of 80, so 168.3 = 0.5x + 0.8x = 1.3x. Solving: x = 168.3/1.3 ≈ 129.5, closest to 130.

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