Mean marks of 60 students of a class are 63 and that of 40 other stude

1.	Mean marks of 60 students of a class are 63 and that of 40 other students are 60. The mean marks of all taken together are1. 61.82. 61.53. 624. None of these
Answer» Correct Answer - Option 1 : 61.8 Given Mean marks of 60 student = 63 Mean marks of 40 other student = 60 Formula Used Average = (sum of observation)/No. of observation Calculation Total marks by all student = 63 × 60 + 40 × 60 = 6180 Average marks of all 100 students = 6180/100 = 61.8 ∴ The required answer is 61.8

Mean marks of 60 students of a class are 63 and that of 40 other students are 60. The mean marks of all taken together are1. 61.82. 61.53. 624. None of these

Answer» Correct Answer - Option 1 : 61.8

Given

Mean marks of 60 student = 63

Mean marks of 40 other student = 60

Formula Used

Average = (sum of observation)/No. of observation

Calculation

Total marks by all student = 63 × 60 + 40 × 60 = 6180

Average marks of all 100 students = 6180/100 = 61.8

∴ The required answer is 61.8

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Mean marks of 60 students of a class are 63 and that of 40 other students are 60. The mean marks of all taken together are1. 61.82. 61.53. 624. None of these

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