A bag contains only pink sweets, white sweets, green sweets and red sweets. The table gives each of the probabilities that, when a sweet is taken at random from the bag, the sweet will be green or the sweet will be red. The ratio number of pink sweets : number of white sweets $$\(=2: 1\)$$ There are 28 red sweets in the bag. Work out the number of white sweets in the bag.

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