Mathematics, 27.09.2019 02:30, halohero7

Apizza shop offers nine toppings. no topping is used more than once. what is the probability that the toppings on a pizza are pepperoni, onions, and mushrooms?
i think the way to solve it is 9c3 which equals 84. and the probability would be 0.012. but my friend is telling me its wrong because he did it by multiplying 1/9 x 1/8 x 1/7.
can someone tell me who is right?

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Apizza shop offers nine toppings. no topping is used more than once. what is the probability that th...