In old man while dialing a 7 digit telephone number remembers that ... VIDEO
In old man while dialing a 7 digit telephone number remembers that the first four digits consists of one 1 's, one 2's and two 3's. He also remembers that the fifth digit is either a 4 or 5 while has no memorising
\( \mathrm{P} \) of the sixth digit, he remembers that the seventh digit is 9 minus the sixth digit. Maximum number of distinct trials he has to try to make sure that he dials the correct telephone number, is
W
(A) 360
(B) 240
(C) 216
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