Acompany that manufactures smartphones makes 70% of the phones with a touch screen and 55% of the phones with hd movie capability. 30% of the phones have both a touch screen and hd movie capability. what is the probability that a smartphone chosen at random has either a touch screen or hd movie capability?

In researching his history report about the civil war, why is ariq most likely to use secondary data than primary data? secondary data provides a starting point to find primary data. secondary data is easier and less time consuming to find. secondary data is always more reliable and credible. secondary data eliminates the need for other research.