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प्रश्न
If the average marks of three batches of 55, 60 and 45 students are respectively 50, 55 and 60, then the average marks of all the students are
पर्याय
53.33
54.68
55
None of the above
MCQ
उत्तर
54.68
Explanation:
Required average
= `((55xx50+60xx55+45xx60)/(55+60+45))`
= `((2750+3300+2700)/160) = 8750/160` = 54.68
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