Question
Question: The figures 4, 5, 6, 7, 8 are written in every possible order. The number of numbers greater than 56...
The figures 4, 5, 6, 7, 8 are written in every possible order. The number of numbers greater than 56000 is
A
72
B
96
C
90
D
98
Answer
90
Explanation
Solution
Required number of ways = 5! – 4! – 3!
120 – 24 – 6 = 90
[Number will be less than 56000 only if either 4 occurs on the first place or 5, 4 occurs on the first two places].