Population of  4000 people,the crude birth rate is 10 / 1000 population.calculate the number of pregnant females
CBR  = 10 / 1000 population means number of live birth per 1000 population is 10.
Number of live births for 4000 population is 40 this implies number of pregnent females is 40. to this add 10% of pregnancy wastage , 44 is the answer.
40
44
54
70