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Q.

Find the arithmetic mean of the first 7 prime numbers. (Give your answer nearest to two decimal places) 

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a

8.29

b

 8.76

c

8.27

d

9.15

answer is A.

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Detailed Solution

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The first 7 prime numbers are 2, 3, 5, 7, 11, 13, and 17.

Total of all the observations 

= 2 + 3 + 5 + 7 + 11 + 13 + 17

= 58

No. of observations=7

∴ Arithmetic Mean of all observations = 587=8.29

Thus, the arithmetic mean of the first 7 prime numbers is 8.29.

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