What age bracket (s) has no participants?​

19-21 and 43-45

Step-by-step explanation:

Please find the attached question

Solution

As we can see in the image , it is the age group 19-21 and 43-45 which do not have any participants.

rest all age groups have some frequency values indicating that they have some participants.

step-by-step explanation:

12475909

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers