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Table: Daily production (in units) of 5 machines over 4 days. Day 1: M1 150, M2 140, M3 180, M4 130, M5 160; Day 2: M1 160, M2 135, M3 190, M4 135, M5 165; Day 3: M1 155, M2 145, M3 185, M4 140, M5 170; Day 4: M1 165, M2 150, M3 195, M4 145, M5 175. What is the average daily production of Machine M3?

1. 187.5
2. 185
3. 190
4. 182.5

Correct answer: 187.5

Solution

The production of M3 over 4 days is 180, 190, 185, and 195. Their sum is 750, and dividing by 4 gives 187.5.

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