In a certain hospital, the mean birth rate of a week was 35. If the mean birth rate fom monday to thursday was 32 and that to of thursday to sunday was 36, find the number of births on thursday.

Answer ASAP

Mean birth rate of the week = 35

∴Total births in the week = 35 × 7 = 245

Mean birth rate from Monday to ?Thursday = 32

∴Total births from Monday to Thursday = 32 × 4 = 128

Mean birth rate from Thursday to Sunday = 36

∴Total births from Thursday to Sunday = 36 × 4 = 144

Thus, Total births from Monday to Thursday + Total births from Thursday to Sunday = 128 + 144 = 272

⇒Total births from Monday to Sunday + Births on Thursday = 272

⇒Births on Thursday = 272 - 245 = 27

Therefore, number of births on Thursday = 27