There are 30 families living in the Willbrook Farms Development. Of these famili
ID: 3293433 • Letter: T
Question
There are 30 families living in the Willbrook Farms Development. Of these families, 18 prepared their own federal income taxes for last year, 8 had their taxes prepared by a local professional, and the remaining 4 by H&R Block.
What is the probability of selecting a family that prepared their own taxes? (Round your answers to 3 decimal places.)
What is the probability of selecting two families, both of which prepared their own taxes? (Round your answers to 3 decimal places.)
What is the probability of selecting three families, all of which prepared their own taxes? (Round your answers to 3 decimal places.)
What is the probability of selecting two families, neither of which had their taxes prepared by H&R Block? (Round your answers to 3 decimal places.)
There are 30 families living in the Willbrook Farms Development. Of these families, 18 prepared their own federal income taxes for last year, 8 had their taxes prepared by a local professional, and the remaining 4 by H&R Block.
Explanation / Answer
a) the probability of selecting a family that prepared their own taxes = 18/30=0.600
b) the probability of selecting two families, both of which prepared their own taxes = (18/30)* (17/29) = 0.352
c) the probability of selecting three families, all of which prepared their own taxes
= (18/30) *(17/29)*(16/28)
= 0.201
d) the probability of selecting two families, neither of which had their taxes prepared by H&R Block
=(26/30)*(25/29)
=0.747
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.