the probability of occurrence of an event A is 0.7, the probability of non occurrence of another event B is 0.5 and of at least one of A or B not occurring is 0.6.Find the probability that at least one of A or B occurs.​

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction