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The mean of 30 students in RA1 was 55%. The mean of 25 students in RA2 was 44%. Find the total mean marks of all the students. |
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Answer» Answer: TOTAL MEAN marks = (55×30)+(44×25)/(30+25) = (1650+1100)/55 = 2750/55 = 50% explanation: MEAN1 (30 students) = 55% or, 55% = (total value)/30 or, total value = 55×30 = 1650 mean2 (25 students) = 44% or, 44% = (total value)/25 or, total value = 44×25 = 1100 now, the total mean marks = 50% ans. CHECK IT OUT!! |
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