Combi offer! #4Discrete Mathematics Level 3
6 cards and 6 envelopes are numbered 1 , 2 , 3 , 4 , 5 , 6. Cards are to be placed in envelopes such that card number 1 is always placed in envelope number 2 and no card is placed in the envelope bearing same number. Find total number of ways to arrange the cards in envelopes?