7 At a garden centre there is a box containing 50 hyacinth bulbs. Of these, 30 will produce a blue flower and the remaining 20 will produce a red flower. Unfortunately they have become mixed together so that it is not known which of the bulbs will produce a blue flower and which will produce a red flower.
Karen buys 3 of these bulbs.
- Find the probability that all 3 of these bulbs will produce blue flowers.
- Find the probability that Karen will have at least one flower of each colour from her 3 bulbs.