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.
Answer & explanation
Correct answer: option 1
A B C
No. of Students: 40 : 50 : 60 -- (i)
Passing Percentage: 100% 90% 80% -- (ii)
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[(i) × (ii)] Pass student : 40 : 45 : 48 = 133
Passing percentage = \(\frac{students\;passed}{total\;students}\) × 100 = \(\frac{133}{150}\) × 100 = 88\(\frac{2}{3}\)%