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Your friend who has tickets to a concert and who selects 2 of them at random to give to you, but assume that your friend has 15 tickets of which 5 are in the front row and 10 are in the tenth row. (1) what is the probability that both of the tickets you receive are in the front row

User Gaucho
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There are 15*14/2 = 105 ways to choose 2 tickets from 15.

There are 5*4/2 = 10 ways to choose 2 tickets from 5.

The probability that two tickets randomly selected are both front-row tickets is ...

... 10/105 = 2/21.

User Vivek
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