How many four-digit numbers that do not contain the digits 3 or 6 are there? Choose the correct choice from the following options:  A) 2401  B) 3584  C) 4096  D) 5040  E) 7200
1st Digit can be filled up by the numbers - { 1 , 2 , 4 , 5 , 7 , 8 , 9 } = 7 ways   2nd Digit can be filled up by the numbers - { 0, 1 , 2 , 4 , 5 , 7 , 8 , 9 } = 8 ways   3rd Digit can be filled up by the numbers - { 0, 1 , 2 , 4 , 5 , 7 , 8 , 9 } = 8 ways   So, total No of ways is 7 * 8 * 8 =&gt; 3584   Hence answer will be (3584)
<result>B</result>
How many four-digit numbers that do not contain the digits 3 or 6 are there?