Question

11. Find the mean of the following frequency distributions:
Weight (kg) 30, 31 ,32, 33, 34,
Number of students 8 ,10, 15, 8, 9

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Answer 1

Answer:

32.3

Step-by-step explanation:

average=((30*8)+(31*10)+(33*15)+(33*8)+(34*9))/(8+10+15+8+9)

            =(240+310+495+264+306)/50

            =1615/50

            =32.3

Answer 2

Answer:

30*8 +31*10 +32*15 +33*8 +34*9

8+10+15+8+9

240+310+480+264+306

50

1600

50

=32