In the following distribution, a. Find the number of families having income range (in Rs) 16000 - 19000.
b. Find the number of families having income less than Rs. 13000

○Monthly income range (in Rs) Number of families:

•Income more than Rs 10000=
100
•Income more than Rs 13000=
85
•Income more than Rs 16000=
69
•Income more than Rs 19000=
50
•Income more than Rs 22000=
33
•Income more than Rs 25000=
15