In an exam, 3 groups having students 40, 50 and 60.Their passing percentages are 100, 90 and 80 respectively. Find the passing percent of all the groups together.

88\(\frac{2}{3}\)

                                           A             B               C

No. of Students:                40      :     50      :       60    -- (i)

Passing Percentage:       100%        90%         80% --  (ii)

                                       ----------------------------------------------

[(i) × (ii)] Pass student :   40      :       45     :      48  = 133

Passing percentage = \(\frac{students\;passed}{total\;students}\) × 100 = \(\frac{133}{150}\) × 100 = 88\(\frac{2}{3}\)%