ผลต่างระหว่างรุ่นของ "Probstat/week2 practice 1"

รุ่นแก้ไขเมื่อ 23:45, 25 สิงหาคม 2557

This is part of probstat

1. Consider a sample space $S=\{0,1,2,3,...,41\}$ . We randomly pick an integer from $S$ .

1.1 What is the probability that a random number from $S$ is divisible by 2 given that it is divisible by 3.

1.2 Are events "an integer divisible by 2 is picked" and "an integer divisible by 3 is picked" independent?

1.3 What is the probability that a random number from $S$ is divisible by 4 given that it is divisible by 3.

1.4 Are events "an integer divisible by 4 is picked" and "an integer divisible by 3 is picked" independent?

@@ แถว 3: / แถว 3: @@
 == Conditional probability review ==
-. Consider a sample space <math>S = \{ 0,1,2,3,...,41 \}</math>.
+. Consider a sample space <math>S = \{ 0,1,2,3,...,41 \}</math>. We randomly pick an integer from <math>S</math>.
 .1 What is the probability that a random number from <math>S</math> is divisible by 2 given that it is divisible by 3.
-.2 We randomly pick an integer from <math>S</math>. Are events "an integer divisible by 2 is picked" and "an integer divisible by 3 is picked" independent?
+.2 Are events "an integer divisible by 2 is picked" and "an integer divisible by 3 is picked" independent?
+.3 What is the probability that a random number from <math>S</math> is divisible by 4 given that it is divisible by 3.
+.4 Are events "an integer divisible by 4 is picked" and "an integer divisible by 3 is picked" independent?
 == Counting ==