number of ways in which eight digit numb...

number of ways in which eight digit number can be formed using the digits from 1 to 9 without repetition, if first four places of the numbers are in increasing order and last 4 places are in decreasing order , is 'n' then `n/70` is equal to.

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The correct Answer is:

9

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Knowledge Check

The number of 3-digit numbers that can be formed using the digits 3, 5 and 7 without repetition is____.

A

3

B

4

C

5

D

6

How many 4 -digit numbers can be formed by using the digits 1 to 9 if repetition of digits is not allowed?

A

3024

B

3000

C

9*9*9

D

None of these

How many 3-digit numbers can be formed by using digit 1,2,3,4,5 without repetition of digits ?

A

12

B

22

C

50

D

60

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