Me pueden ayudar a sacar 3 ecuaciones? es para crear una matriz 3x3 Disponemos de 235 euros en billetes de 5, 10, y 20 euros. Sabiendo que tenemos un total de 19 billetes y que el número de billetes de 20 euros es el doble que el de billetes de 10 euros. Calcula el número de billetes de cada tipo.

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.