The number of numbers greater than a million that can be formed with the digits 2, 3, 0, 3, 4, 2 and 3 is

Number of 7 digit numbers formed using the digits 2, 3, 0, 3, 4, 2, 3 $=\frac{7!}{2! 3!}$

                                                                                                                       $=\frac{7\times 6\times 5\times 4}{2}=420$

These numbers also includes the numbers that begin with ‘0’

No of 7 digit numbers formed using 2, 3, 0,  3, 4, 2, 3 that begin with 0 $=\frac{6!}{3! 2!}=60$

∴ numbers greater than a million formed using 2, 3, 0, 3, 4, 2, 3=420-60=360