Four coins are tossed simultaneously, then the sample space is,Tossed coins = 4Hence, The number of faces  = 24= 16{HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH, THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}