. verify that f(x) = 2x/k(k + 1) for x = 1, 2, 3, ... , k can serve as the probability distribution of a random variable with the given range

The probability of rolling a sum of 7 when rolling two dice simultaneously is 0.167. you decide to test that probability by rolling th dice 12 times. what is the probability that exactly 2 of the rolls is a sum of 7?

Fourth-graders richard and bruce sat on the stoop outside the school. they had missed their bus and now had to make the decision whether to walk taking a shortcut or just wait until their mothers noticed they had not arrived home

During a session with her analyst sheila began to treat him with tenderness and dependence much like her relationship with her father freud called this phenomenon