A baker produces bread buns and bread rolls. The weights of buns, $$\(B\)$$ grams, and the weights of rolls, $$\(R\)$$ grams, are such that $$\(B \sim \mathrm{N}\left(55,1.3^{2}\right)\)$$ and $$\(R \sim \mathrm{N}\left(51,1.2^{2}\right)\)$$ A bun and a roll are selected at random. Find the probability that a bag of buns weighs less than a bag of rolls. (6)

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