Find the average of all the prime numbers between 1 to 50.

24.9 28.9 21.9 29.9

21.9

⇒Prime nos. = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47 ⇒ Average = \(\frac{(2+3+5+7+11+13+17+19+23+29+31+37+41+43+47)}{15}\) = 21.9 (approx)