China Naming Network - Company naming - The temple draws lots for ugly number 57.
The temple draws lots for ugly number 57.
Q: There are three incidents. If conditional probability is used, a, b, c, b and c need to be considered.
Not only is it the first step of AC, but the probability that A can't draw out the difficult sign is 6/10;
In the second step, the probability that B draws a simple ticket is 4/( 10- 1).
So the probability of event A is 6/ 10*4/9=4/ 15.
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