A bin contains 400 colored erasers that fit on the ends of pencils. The
numbers of erasers of each color is as follows.
color Green Blue Red Yellow
Number 88 60 160 92
a) A random sample of 25 erasers is selected, with replacement,
from the bin, find the probability that:
(i) exactly 2 erasers are green;
(ii) at most 3 erasers are blue (4 decimal) ;(use excel and write
the function in answer sheet)
(iii) between 8 erasers and 12 erasers, inclusive, are red. ;(use
excel and write the function)
b) Erasers are selected at random, without replacement, from the bin
until 5 yellow erasers are obtained.
Give two reasons why a binomial distribution does not model
the number of erasers selected.