Let a and b be subsets of a universal set u and suppose n(u)=400, n(a)=135, n(b)=80, and n(a n b)=60. find the number of elements in the set n(ac n bc)

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e. g. 98.7654). x f(x) 0 1 2 3

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?