A) For a data set with 10 classes that ranges from 25 to 200, what would be an appropriate class interval?

b) For a data set with 230 observations, how many classes should you have?

c) Where would the 60th percentile be located in a data set with 120 observations? (Side Note: Sometimes The number is not a whole number. In that case, count to the position of the leading number first, then multiply the difference between that number and the next number by the decimal portion.)

for C) The number I got was 72.6 but I dont know what to do is after that. its not the right answer