There are 50 candies in the bag, 28 are red, 10 are blue, 8 are green and 4 are yellow. what is the probability of choosing five pieces of candy and getting 3 blue and 2 green

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics