Question 290453
one-half of the audience left after a few minutes.
 Five minutes later, one-third of the remaining audience left.
 Ten minutes later, one-fourth of those remaining left, leaving only nine people in the audience. 
How many people were in the audience
:
Let x = no. in the audience
:
"one-third of the remaining audience left.
that leaves 2/3
{{{2/3}}}*({{{1/2}}}x) = {{{2/6}}}x = {{{1/3}}}x
:
"one-fourth of those remaining left,"
that leave 3/4
{{{3/4}}}*{{{1/3}}}x = {{{3/12}}}x = {{{1/4}}}x
:
"leaving only nine people in the audience. "
{{{1/4}}}x = 9
Multiply by 4
x = 36 people in the audience