A number X is chosen at random from the series 2,5,8,... and another number Y is chosen at random from the series 3,7,11,.. Each series has 100 terms. Find P[X=Y].

This isn't a hard question but I forgot how to manipulate series from calculus.

How would you approach this problem? I can do this problem by listing all the numbers that matches but how can you do this without listing?

This isn't a hard question but I forgot how to manipulate series from calculus.

How would you approach this problem? I can do this problem by listing all the numbers that matches but how can you do this without listing?

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