<prompt> A district has total population 10 lacs, with under 16 population beings 30. The prevalence of blindness is 0.81000 among under 16 population. Calculate total number of blind among under 16 population in the district -240240024000240000  <response>: Ans. is a i.e., 240 o In this question, population of under-16 is 3 lacs 30 of 10 lacs. o Prevalance of blindness is 0.8 every 1000 under-16 population. o So total number of blind among under-16 population 0.8 x 3000001000 240 