A game consists of two tokens being drawn at random from a barrel containing 20 tokens. There are 17 red tokens and 3 black tokens. The player keeps the two tokens drawn.
- Complete the probability tree by writing the missing probabilities in the boxes. (2 marks)
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- What is the probability that a player draws at least one red token? Give your answer in exact form. (2 marks)
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- `187/190`
Show Worked Solution
| i. | |
ii. `P(text(at least one red))`
`= 1-P(BB)`
`= 1-3/20 xx 2/19`
`= 187/190`