The number of six digit numbers that can be formed from the digits 1, 2, 3, 4, 5, 6 and 7
The number of six digit numbers that can be formed from the digits 1, 2, 3, 4, 5, 6 and 7 so that digits do not repeat and the terminal digits are even is
(a) 144 (b) 72 (c) 288 (d) 720 (e) None of these
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(d) Required number of possible outcomes = Total number of possible outcomes – Number of possible outcomes in which 5 does not appear on any dice. (hence 5 possibilities in each throw)
= 63 – 53 = 216 – 125 = 91
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