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Use the data in the following table , which lists drive - thru order accuracy at popular fast food chains Assume that orders are randomly selected from those included in the table Drive thru Restaurant A B с D Order Accurate 312 277 250 144 Order Not Accurate 32 60 37 19 If three different orders are selected , find the probability that they are all from restaurant A

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mickymike92

If three different orders are selected, the probability that they are all from restaurant A is 0.0280

What is probability if three different orders are selected, that they are all from restaurant A?

Total order both accurate and not accurate = 1131

Total orders from restaurant A (both accurate and not accurate) = 344

Probability of first order from A = 344/1131

Probability of second order from A = 343/1130

Probability of third order from A = 342/1129

Probability of the first three orders from A = 344/1131 × 343/1130 × 342/1129

Probability of the first three orders from A = 0.0280

Therefore, if three different orders are selected, the probability that they are all from restaurant A is 0.0280

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