Self Maths Puzzle Numerical Ability Probability

A small family consisting of 4 ( father , mother , son , daughter ) goes to a photo studio . Father says to the photographer , " I need all the possible photographs of our family " . how many pictures can he take , such that at least one person should be there in the photo

note : FS , SF are considered two different pictures

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Self Other Question

what is the next letter in the series
J,M,M,J,S,_
We have to use only 0 digit 5 times but by using any operation your ans is 120.