Two friends have a favourite compilation CD that containssome of their all-time favourite tracks….

Two friends have a favourite compilation CD that containssome of their all-time favourite tracks. There are 20 trackson the album. Sam likes five tracks and Chris likes six othertracks. If they program their CD player to play three tracksselected at random from the album, and assuming that theCD player can only select a track once, what is:(a) The probability that none of their favourites isselected?(b) The probability that at least one of Sam’s favourites isselected?(c) The probability that at least one of Chris’s favourites isselected?

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