Posted by **Anon** on Wednesday, July 17, 2013 at 9:42pm.

A pizza parlor has 13 different toppings available for its pizzas, and 2 of these toppings are pepperoni and anchovies. If a customer picks 2 toppings at random, find the probability that pepperoni is one of the toppings.

Round to four decimal places.

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**PsyDAG**, Thursday, July 18, 2013 at 1:03pm
Probability of picking pepperoni on the first pick = 1/13.

Assuming that customer does not want to "double up" on any topping, 12/13 for first pick for some other topping and 1/12 for second for pepperoni. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

Either-or probabilities are found by adding the individual probabilities to combine with first sentence results.

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**Anonymous**, Monday, March 23, 2015 at 2:28am
292

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