On lana's phone 4⁄7 of the pictures were selfies. of the other pictures on her phone 1⁄3 were of her cat. if she has 252 pictures on her phone, how many are not of her cat or selfies?

Assuming I did my math right, 24.

Add 1/3 and 4/7 
(1/3)+(4/7)= (19/27)

Make a proportion:
(19/21)*(x/252)
x = 228

Subtract 228 from 252
252 - 228 = 24

Set square i think so

Ifound this on google “a skewed (non-symmetric) distribution is a distribution in which there is no such mirror-imaging. a "skewed right" distribution is one in which the tail is on the right side. a "skewed left" distribution is one in which the tail is on the left side. the above histogram is for a distribution that is skewed right.” i hope this you for what your looking for