In the year 2006, what is the number of net users who use the net for only miscellaneous work?
(c)The number of people using the net for miscellaneous work is 6.912 – 1.4112 = 5.5 million.
In a survey of 300 android mobile users, who make video calls, 75 people said they use only Viber, 45 use only Skype and 90 people use both. The number of persons who use neither Viber nor skype is __.