Let the number of flights to depart on time be = x.
Given:
1 late flight & 3 on time flights.
To find:
on time flights/total flights > 90/100
(3 + x )/ (1+3+x) > 9/10
==> x>6.
Hence, ans : 7.
Given:
1 late flight & 3 on time flights.
To find:
on time flights/total flights > 90/100
(3 + x )/ (1+3+x) > 9/10
==> x>6.
Hence, ans : 7.
