how to read images randomly from each folder?

I have 10 folder, each contain 100 images. I have to select 50 images from one folder and 3 random images each from the other remaining 9 folder finally 77 images should be read

Answer 1

[KSSV]

img = 1:100 ;   % indices of images 
iwant = randperm(length(img),3) ;