Printed circuit cards are placed in a functional test after being populated with semiconductor chips. a lot contains 140 cards, and 20 are selected without replacement for functional testing. a. if 20 cards are defective, what is the probability that at least 1 defective card is in the sample? b. if 5 cards are defective, what is the probability that at least 1 defective card appears in the sample?

Xinhong company is considering replacing one of its manufacturing machines. the machine has a book value of $39,000 and a remaining useful life of 5 years, at which time its salvage value will be zero. it has a current market value of $49,000. variable manufacturing costs are $33,300 per year for this machine. information on two alternative replacement machines follows. alternative a alternative b cost $ 115,000 $ 117,000 variable manufacturing costs per year 22,900 10,100 1. calculate the total change in net income if alternative a and b is adopted. 2. should xinhong keep or replace its manufacturing machine

Heather has been an active participant in a defined benefit plan for 19 years. during her last 6 years of employment, heather earned $42,000, $48,000, $56,000, $80,000, $89,000, and $108,000, respectively (representing her highest-income years). calculate heather’s maximum allowable benefits from her qualified plan (assume that there are fewer than 100 participants). assume that heather’s average compensation for her three highest years is $199,700. calculate her maximum allowable benefits.

Anational survey asked people, "how often do you eat out for dinner, instead of at home? " the frequencies were as follows.