mean of 5 numbers is 51 and mean of other 4 number is 54.find the mean of all nine numbers
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mean of 5 number =51
sum of mean of 51 no. =51 ×5
=255
mean of 4 no. =54
sum of mean of 4no. =54×4
= 216
sum of mean of 9 no. =255 +216
=471
mean of 9 number = 471 ÷9
=52.33
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sum of mean of 51 no. =51 ×5
=255
mean of 4 no. =54
sum of mean of 4no. =54×4
= 216
sum of mean of 9 no. =255 +216
=471
mean of 9 number = 471 ÷9
=52.33
please mark as brainlist...
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