the mean temperature of the week on a certain city is 25 C
the mean temperature of Monday to Thursday is 23
the mean temperature of thursday to sunday is 28 C find the temperature on thrusday

• (M+Tu+We+Th+Fr+Sat+Sun)/7=25
  =>(M+Tu+We+Th+Fr+Sat+Sun)=175 -----(1)
  (M+Tu+We+Th)/4=23
  =>(M+Tu+We+Th)=92 -----------------(2)
  (Th+Fr+Sat+Sun)/4=28
  =>(Th+Fr+Sat+Sun)=112 -------------(3)
  Substitute (2)in (1)
  =>(Fr+Sat+Sun)=83 -----------------(4)
  Now (3)-(4) gives temperature on thursday = 112-83=29c
  
• 11 years agoHelpfull: Yes(1) No(0)