A local post office sells stamps in packs of 4,6,and 7. Andy bought se era packs of 6. Harry bought several packs of 7. Erin bou
2 answers:
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a) I have attached an image of a probability tree diagram.
b) 0.02332 (please round to where you need)
The probability that Terri chooses a blue pen is 2/7. The probability that Terri chooses a red pen is 4/7. The probability that Terri chooses neither a red nor blue pen is 1/7.
2/7 x 4/7 x 1/7 = 0.02332
Hope this helps! :)
