50% of the babies are born female. olive wants to find the probability that 20 or more of the 50 babies born today were female. we need to design a simulation. which random device can be used to best represent this situation?
a. double sided coin heads females, tails males
b. use a random generator use number 1-100, assign 1-20 as female and 21-100 as male
c. use a pair of dice. doubles for female and the rest for male
d. use a spinner with 50 parts and assign 20 parts as female and 30 parts for male

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −