Quote:
Originally Posted by tagiraldo  Assume the market proportion of the phone provider XY to be 50% in a given country. Assume it means that 50% of all existing phone numbers in the country are of the provider XY.
a) What is the probability that from the 10 randomly selected phone numbers, the first two numbers are of the provider XY and the next 8 numbers are of some other provider? |
The probability that the first two numbers are from XY is
, the probability that the next 8 are from some other provider is
The required probability is the product of these.
CB