rameshsalamimagar7 rameshsalamimagar7

22-12-2022
SAT

contestada

(b) The mean marks got by 300 students in the subject of statistics are 45. The mean of the top 100 of them was found to be 70 and the mean of the last 100 was known to be 20. What is the mean of the remaining 100 students?

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