Question

The mean
of first 5 observations is 20 and the
last 5 observations is 45. What is mean
of all 10 obsenvations ? ?​

Answer 1

Answer:

Step-by-step explanation:

the sum of first 5observations = 20

20×5=100

the sum of last 5observations = 45

45×5= 225

then the mean of all observations is = 20+45/10= 6.5

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Answer 2

Answer:

32.5

Step-by-step explanation:

sum of first 5=20*5=100

sum of last 5=45*5=225

sum of all observation=100+225=325

mean =325÷10=32.5