Number 24 is asking what are the odds, So what you would do is count all the peices which would be 6. Two of those peices are white and 4 are grey so your answer would be
Number 25 is asking about dice so add up the faces from one dice and thats 6, but you have two so it would be 6*2 which = 12.
You just divide 9 by 860 to get .0146116
So simplest answer would be 1% chance or .01 chance
This is experimental probability.
If 12 were found to be defective out of 280 the experimental probability of a purifier being defective is:
12/280 which is:
4.3% (to nearest tenth of a percent)