The number of birds on each of the islands X and Y remains constant from year to year; however, the birds migrate between islands. After one year, 20 percent of the birds on X have migrated to Y, and 15 percent of the birds on Y have migrated to X. ?
If the total number of birds is 14, 000, how many birds are on island X????
the options given are
A) 2,800
b) 6,000
c) 6,788
d) 7,212
e) 8,000
If the total number of birds is 14, 000, how many birds are on island X????
the options given are
A) 2,800
b) 6,000
c) 6,788
d) 7,212
e) 8,000
1 Answer
Apr 29, 2018
Let the number of birds in island X be
After one year, 20 percent of the birds on X have migrated to Y, and 15 percent of the birds on Y have migrated to X.
But the number of birds on each of the islands X and Y remains constant from year to year;
So
Hence number of birds in