Question

Total number of 4 digit number do not having the digit 3 or 6.

Answer 1

Answer:

Step-by-step explanation:

1st blank can be filled in 7c1 ways (0,3,6 are neglecetd)

2st blank can be filled in 8c1 ways (0 considered along with 1,2,4,5,7,8,9)

3st blank can be filled in 8c1 ways

4st blank can be filled in 8c1 ways

therefore total 4 digit num without 3 and 6 is 7*8*8*8=3584

Hope it helps you....