Question

How many numbers greater than 150 can be formed from the digits 1,2,3,4,5 if no repetition is allowed​

Answer 1

51 numbers

Explanation:

152,153,154, 213,214,215, 231,234,235, 241,243,245, 251,253,254,312,314,315,321,324,325,341,342,345,351,352,354, 412,413,415, 421,423,425, 431,432,435, 451,452,453, 512,513,514, 521,523,524,531,532,534, 541, 542, 543

Answer 2

Step-by-step explantion - Of these 60/5 = 12, start with a 1 Of these only 3 are greater than 150 ... A number with 4 digits is formed from the digits 0, 3, 6, 7, and 9 without repetition. ... How many three digit numbers can be formed using the digits 2, 3, 4, ... How many three digits can be made from numbers 0 to 9 with repetition allowed ...