If ${ }^n C_{12}={ }^n C_8$, then $n$ is equal to

The number of possible outcomes when a coin is tossed 6 times is

The number of different four-digit numbers that can be formed with the digits 2, 3, 4, 7 and using each digit only once is

The sum of the digits in unit place of all the numbers formed with the help of 3, 4, 5 and 6 taken all at a time is

The total number of words formed by 2 vowels and 3 consonants taken from 4 vowels and 5 consonants is