if mean of 10 scores is 20 and mean of 20 scores is 27 and mean of 30 observations is 30 then combined mean equals to
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((10*20)+(20*27)+(30*30))/60
1840/60
30.66
1840/60
30.66
mahidhar4:
from the deck of 52 cards all the spades are removed from the deck along with queen and 10 cards then the probability of picking a king of heart ?
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30.66 is right answer..
from the deck of 52 cards all the spades are removed from the deck along with queen and 10 cards then the probability of picking a king of heart ?
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