Maths-
A seven digit number is in form of abcdefg (g, f, e, etc. are digits at units, tens, hundred place etc.) where a < b < c < d > e > f > g. The number of such numbers are
Maths-General
- 1981
- 2009
- 1560
- 1870
Answer:The correct answer is: 1560Cases : i) If d = 6 then seven digit numbers possible are = 5C3. 3C3
[as a,b,c can be choosen from 1,2,3,4 or 5 & similarly e,f,g can be choosen from the unused 2 digit which are less than 6 & 0 can be used]
ii) If d = 7 then numbers possible =,
iii) If d = 8 then numbers possible = 
iv) If d = 9 then numbers possible = 
Add all cases
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