Multiple choice

In shewak's opinion, his weight is greater than 76 kg but loss than 83 kg. His sister does not agree with shewak and she thinks that shewak's weight is greater than 71 kg but less than 81 kg. His father's view is that his weight cannot be greater than 79 kg. If all are them are correct in their estimation, what is the average of different probable weights of shewak?

  1. 67kg

  2. 68kg

  3. 72kg

  4. 78kg

  5. None
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The three estimates together give weights greater than 76 kg and at most 79 kg. Assuming weights are measured in whole kilograms, the possible values are 77, 78, and 79, whose average is 78 kg.

AI explanation

From the three conditions, Shewak's weight must be greater than 76 kg, less than 81 kg, and less than or equal to 79 kg. This means the possible integer weights are 77 kg, 78 kg, and 79 kg. The average of these different probable weights is (77 + 78 + 79) / 3 = 234 / 3. The result is 78 kg.

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