14/20=0.7 or 70% are soft-centred. If we take two candies we have three possibilities associated with probabilities: Both soft-centred: 0.7²=0.49 or 49% Both hard-centred: 0.3²=0.09 or 9% One of each: 2×0.3×0.7=0.42 or 42%. 49+9+42=100%. So these are all the possible outcomes.
