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Answer to Q33

It's dark. You have ten grey boxes and ten blue boxes and you want a pair of the same colour. All boxes are exactly the same except for their colour. How many boxes would you need to take with you to ensure you had at least a pair?

To ensure you select a pair of boxes of the same colour, the total number of boxes you need to select is 3 because with 3 boxes you get 3 grey boxes or 3 blue boxes or 2 grey boxes and 1 blue box or 1 grey box and 2 blue boxes. Either ways, you have atleast 2 boxes of same colour

Answer: 3

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472 viewsAug 16, 2019 at 13:06

Answer to Q33

It's dark. You have ten grey boxes and ten blue boxes and you want a pair of the same colour. All boxes are exactly the same except for their colour. How many boxes would you need to take with you to ensure you had at least a pair?

To ensure you select a pair of boxes of the same colour, the total number of boxes you need to select is 3 because with 3 boxes you get 3 grey boxes or 3 blue boxes or 2 grey boxes and 1 blue box or 1 grey box and 2 blue boxes. Either ways, you have atleast 2 boxes of same colour

Answer: 3

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