TSI Question P1 – Incorrect Answer

The answer you selected is incorrect.

ChipsFriesTotal
Roast Beef
Sandwich
91322
Turkey
Sandwich
141125
Total232447

To answer this question we have to recognize that we are only looking at the individuals who ordered a roast beef sandwich. So, our sample space is only 22. 13 individuals ordered fries with their roast beef sandwich so the probability is , which is choice B.

This is an example of conditional probability. For a video about conditional probability click here.

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