Answer: the answer should be 90
Answer: 0.0325
Step-by-step explanation:
Binomial probability distribution formula for x successes in n trials:-
, where n is the number of trials , p is the probability of success.
Given : The probability that taxpayers who filed their tax return are electronically self-prepared their taxes : 
If three tax returns submitted electronically are randomly selected, then the probability that all three were self-prepared is given by :-

Hence, the probability that all three were self-prepared =0.0325
It’s the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. ... the particular auditory effect produced by a given cause: the sound of music. any auditory effect; any audible vibrational disturbance: all kinds of sounds.
y= -947/8
Just isolate the variables, even though this is a long, painstaking, agonizing process
:)