請各位幫幫手,我唔係幾肯定點畫呢個tree diagram...
3. John selects 2 red packets at random from a box containing 4 red packets.Among the 4 red packets,2 are of amount $50,1 is of amount $100 and 1 is of amount $200.
(a) By using a tree diagram,find all the possible outcomes