Four workers at a fast food restaurant pack the take-out chicken dinners. John packs 45% of the dinners but fails to include a salt packet 4% of the time. Mary packs 25% of the dinners but omits the salt 2% of the time. Sue packs 30% of the dinners but fails to include the salt 3% of the time. You have purchased a dinner and there is no salt.
a.Find the probability that John packed your dinner.b.Find the probability that Mary packed your dinner.
What will be an ideal response?
| a. | 0.5625 |
| b. | 0.15625 |
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