1.

Find the average of all prime numbers between 20 and 40

Answer»

Answer:

30

Step-by-step explanation:

Prime numbers between 20 and 40 are :

         23 , 29 , 31 and 37

Their SUM = 23 + 29 + 31 + 37

                 = 52 + 68

                 = 120

Number of terms = 4

Therefore,

   AVERAGE = sum of terms / number of term

        = 120 / 4

        = 30



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