The most serious shortcoming of the haphazard sample selection method is:
A. it is difficult to remain completely unbiased in the selection.
B. it is not subject to statistical sampling methods.
C. it is costly to use.
D. it is time consuming to use.

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

the answer is 8/21

hope this

40 i don’t know lololol

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.