A data set has 1000 records and 50 variables with 5% of value missing, spread randomly throughout the records and variables. An analyst decides to remove records that have missing values. About how many records would you expect be removed?

一组数据，1000 records, 50 个变量。 在 随机的1000 records 和 50 个变量中，有5% 的数据不存在。如果删除那些含有不存在数据的records,  多少records将被删除？？