2018
6) In order to get through in an examination of nine papers a candidate has to pass in more papers than the number of papers in which he fails. The number of ways in which he can fail, in this examination is :
(1) 128 (2) 255 (3) 256 (4) 9×(8)!
2016
63) A code word of length 4 consists of two distinct consonants in the English alphabet followed by two digits from 1 to 9, with repetition allowed in digits. If the number of code words so formed ending with an even digit is 432 k, then k is equal to :
(1) 5 (2) 49 (3) 35 (4) 7