Multiple choice

The average temperature on Tuesday, Wednesday and Thursday was (37^0)C. The average temperature on Wednesday, Thursday and Friday was (38^0)C. If the temperature on Friday was (39^0)C. Find the temperature on Tuesday.

  1. $\(38^0\)C$
  2. $\(35^0\)C$
  3. $\(36^0\)C$
  4. $\(34^0\)C$
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C Correct answer
Explanation

Let T, W, Th, F be temperatures on Tuesday, Wednesday, Thursday, Friday. T + W + Th = 3 × 37 = 111. W + Th + F = 3 × 38 = 114. Given F = 39, so W + Th = 114 - 39 = 75. Substituting: T + 75 = 111, so T = 36. Tuesday's temperature was 36°C.

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