the total no of people = 160
Let the no. of people who left the room = x
Therefore the no. of people remaining in the room = 160-x
Of 160 people, 155 are women = 24
Of the x people who left the room 30% were women = 30% (x)
Of the remaining people in the room (160 – x) 10% are women = 10% (160-x)
ð 30% (x) + 10% (160 – x) = 24
ð solving for x
ð x =40