Let n denote the number of all n-digit positive integers formed by the digits `0, 1` or both such that no consecutive digits in them are 0. Let `b_n` = the number of such n-digit integers ending with digit 1 and `c_n`= the number of such n-digit integers ending with digit 0. The value of `b_6`, is

Let a_n denote the number of all n-digit positive integers formed by the digits 0, 1, or both such that no consecutive digits in them are 0. Let b_n= The number of such n-digit integers ending with digit 1 and c_n= Then number of such n-digit integers with digit 0. The value of b_6 is

Let a_(n) denote the number of all n-digit numbers formed by the digits 0,1 or both such that no consecutive digits in them are 0. Let b_(n) be the number of such n-digit integers ending with digit 1 and let c_(n) be the number of such n-digit integers ending with digit 0. Which of the following is correct ?

The number of 'n' digit numbers such that no two consecutive digits are same is

The number of n-digit numbers which contain the digits 2 and 7, but not the digits 0,1,8,9, is

Find the number of n digit numbers,which contain the digits 2 and 7, but not the digits 0,1,8,9.

Let N denotes the number of odd integers between 550 and 800 using the digits 4,5,6,7,8 and 9. Find the sum of the digits in N .

Number of four digit positive integers if the product of their digits is divisible by 3 is.