How many three digits numbers greater than 600 can be formed by using the digits 4,5,6,7,8?	Pick one
A) 45. B) 55. C) 65. D) 85. E) 75.
Clearly repetition of digits allowed. Since the three digits number greater than 600 will have 6,7 or 8 at hundreds place. So hundreds place can be filled in 3 ways. Each of ten's and one's place can be filled in 5 ways. Hence, total number of required number =3x5x5 =75. Answer : 75.
<result>E</result>
How many three digits numbers greater than 600 can be formed by using the digits 4,5,6,7,8?