Question

9. Find the mean of the numbers: 40, 43, 50, 37, 32, 38,
10. Calculate the mean of the marks obtained by 10 students in Physics test.
Marks: 13, 16, 14, 9, 18, 11, 7, 10, 12, 20
11. Find the arithmetic mean of the monthly income of 6 labourers which are 3 70, 7 42,785,
65 70 82 59. 81. 76, 67, 60, 65 and​

Answer 1

Answer:

■ MEAN:

MEAN IS THE RATIO OF SUM OF OBSERVATIONS AND NO OF OBSERVATIONS

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9) given data = 40 , 43 , 50 , 37 , 32 , 38

No of observations = 6

sum of the observations = 40+43+50+37+32+38

= 240

∴ Mean = 240/6 = 40

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10) given data = 13, 16, 14, 9, 18, 11, 7, 10, 12, 20

No of observations = 10

sum of obsevations = 13+16+14+9+18+11+7+10+12+ + + 20 = 130

∴ Mean = 130/10 = 13

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Answer 2

Answer:

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