SOLUTION
SInce all the coloured blocks are put into one box. We will find the total number of coloured bocks first.
Step 1: Find the total number of coloured blocks and individual coloured blocks
[tex]15+14+16+15+15+15=90[/tex]Total Number of red blocks.
[tex]15+15=30[/tex]Total number of blue blocks
[tex]14+15=29[/tex]Total number of white blocks
[tex]16+15=31[/tex]Step 2: Find the probability of selecting each colour of block from the one box.