Question

Atta cricket test match 2 by 7 of the spectators where in a covered place while 15000 swear in open place find the total number of spectators

Answer 1

let no. of spectators be x
2/7 th of spectators = 2x/7
as 15000 spectators are left, 
2x/7+15000= x
x-2x/7 = 15000
5x/7= 15000
x= 15000*7/5 = 21000 spectators