The frequency of the second class is 6.
Since the class width is 6 and the lower limit of the first class is 50, this means the first class goes from 50-55. This would put the second class at 56-61. There are 6 data points in this set that would go in the second class.
Since you OWE,
the best integer is
-20
The answer is 643,251 ≤633,512 ≤633,893 that's the right answer because i had it for homework before and i got it right don't forget to make it your best answer