Mean of 10 observations is 20 and that of other 15 observations is 16. Mean of all 25 observations will be :
16.6
18.6
19.6
17.6
Statistics
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Question

Mean of 10 observations is 20 and that of other 15 observations is 16. Mean of all 25 observations will be : 1. 16.6 2. 18.6 3. 19.6 4. 17.6

KnowledgeBoat · Accepted Answer

Mean of 10 observations = 20 Mean of 15 observations = 16 Mean = Sum of 10 observations = 10 × 20 = 200 Sum of 15 observations = 15 × 16 = 240 Total Sum = 200 + 240 = 440 Total number of observations = 25 Mean = = 17.6. Hence, option 4 is the correct option.

Mathematics

Mean of 10 observations is 20 and that of other 15 observations is 16. Mean of all 25 observations will be :
16.6
18.6
19.6
17.6

Statistics

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