Find the missing information in the following table: {:(,,A,,B,,C,,"Combined"),("Number(N)",,10,,8,,-,,""24),("Mean"(barX),,20,,-,,6,,""15):}

Find the missing information in the following table: {:(,,A,,B,,C,,"C

1.	Find the missing information in the following table: {:(,,A,,B,,C,,"Combined"),("Number(N)",,10,,8,,-,,""24),("Mean"(barX),,20,,-,,6,,""15):}
Answer» Solution :Missing number for C = 24 - (10+8) = 6 Let MEAN for B = x We know that, `barX_(123)=(barX_(1)N_(1)+barX_(2)N_(2)+barX_(3)N_(3))/(N_(1)+N_(2)+N_(3))` `:. ""15=((20xx10)+(8xxx)+(6xx6))/24` `200+8x+36=15 xx 24` `RARR""236+8x=360` `rArr""8x=360-236` `rArr""8x=124` `rArr""x=(124)/8` `rArr""x = 15.5` Thus, Missing Number for C = 6. Mean of B = `15.5`.