CA CPT Model Test Paper 3 with solutions for online practice

Question : 188 of 200

Marks: +1, -0

The following data is given, based on 450 students for marks in statistics and Economics at a certain examination:

\table \Means \marks \in \Statistics,=,40;\Means \marks \in \Economics,=,48;\S.\D \of \marks (\Statistics),=,12;\Variance \of \marks (\Economics),=,256

Sum of the products of deviations of marks from their respective mean = 42075
The average marks in Economics of candidates who obtained 50 marks in Statistics is:

45
54.5
54
47.5

Validate

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