Question

A B C D Order Accurate 316 277 250 146 Order Not Accurate 30 54 31...

A B C D
Order Accurate 316 277 250 146
Order Not Accurate 30 54 31 14

If one order is​ selected, find the probability of getting an order from Restaurant A or an order that is accurate. Are the events of selecting an order from Restaurant A and selecting an accurate order disjoint​ events?

Math   Statistics-And-Probability   
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Answer #1
A B C D Total
Order Accurate 316 277 250 146 989
Order Not Accurate 30 54 31 14 129
Total 346 331 281 160 1118

If one order is​ selected then the probability of getting an order from Restaurant A or an order that is accurate

=0.9114

Addition rule of probability

If two events disjoint then

Therefore, two events are not disjoint.

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