It is hard to get the perfect number, by the time you read these answers, a few hundred phones would have been sold.. It was around 800 million Android users and 300 million iOS users in 2013.. Apple reached 1 billion phones in November of 2014.. Evans estimates that Apple paid iOS app developers $10 billion in the last 12 months vs. the $5 billion Google paid Android developers.
It can also be used in socioeconomic research. Theoretical probability is also used in certain research and businesses. 1.Experimental probability measures the ratio of outcome vs. attempt while theoretical probability measures the favorable or wanted outcome vs. the possible outcome.
But, if we do the experiment for 10 times the results may be different. It might give 5 times the yellow, 2 times the red and 3 times the blue ones, thus the result gives an experimental probability of 2/10 as the probability of getting a red ball. The difference between the values obtained from the experiment and the theory is of a major concern when designing the statistical experiments.