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Question : Directions: The weight of the four boxes is 20, 40, 80, and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes, and in a combination, a box can be used only once?

Option 1: 220

Option 2: 230

Option 3: 150

Option 4: 210


Team Careers360 23rd Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 220


Solution : Given:
The weight of the four boxes is 20, 40, 80, and 90 kilograms.

The total weight of all possible combinations of boxes is as follows –
20 + 40 = 60; 20 + 80 = 100; 20 + 90 = 110; 40 + 80 = 120;
40 + 90 = 130; 80 + 90 = 170; 20 + 40 + 80 = 140;
20 + 40 + 90 = 150; 20 + 80 + 90 = 190; 40 + 80 + 90 = 210;
20 + 40 + 80 + 90 = 230

Therefore, there is no total weight of 220 kilograms in any combination. Hence, the first option is correct.

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