Question

explanation needed
and please anser both of em

Answer 1

Step-by-step explanation:

a) Modal is the most common one as in, the one with the most frequency

b) Median is the center-most one since the mass ranges up to 22 the half would be 11.5, which comes in the 11-13 range making 11-13 the answer

c) The mean is somewhat long in working in this we must take the midpoint of each range and multiply it with the frequency for every range and divide it by the total number of packages in this case 30 so the working would be as follows;

((5+7)/2)x4 + the next one and so on with division by 30 in the end