Statistics and Probability

In the following distribution :

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

the number of families having income range (in Rs) 16000 – 19000 is

(A) 15 (B) 16 (C) 17 (D) 19