in a survery of 1000 families it was found that 710 drink tea with breakfast while 230 drink coffee. the families who drink both tea and coffee are half in number compared with those who drink neither tee. what's the number of families who drink both tea and coffee?​

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list