Thirty five percent of the employees in a company have managerial positions, and 67 percent of the employees in the company have mba degrees. also, 53 percent of the managers have mba degrees. using the probability formulas, find the proportion of employees who either have mbas or are managers.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Combine like terms to make a simpler expression 3z+z

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up