80% of the members in a badminton club were male and the rest were female.after 450 members left the club,the number of male members was decreased by 25% and the number of female members was decreased by 50%.find the mumber of members in the badminton club at first.

Answer 1

X members at first.
0.8 * x = 0.8x Male.
x - 0.8x = 0.2x Female.
After 450 members left:
0.75*0.8x + 0.5*0.2x = x-450.
0.6x + 0.1x - x = -450, X = 1500.