Question

प्रथम 300 प्राकृतिक संख्याओं का औसत कितना है ?
(a) 150 (b) 150.5 (c) 30 (d) 300​

Answer 1

Step-by-step explanation:

Sum of first 300 natural numbers

$= \frac{n(n + 1)}{2} \\ = \frac{300(300 + 1)}{2} \\ = 150 \times 301 \\ = 45150 \\ Average \: = \frac{45150}{300} \\\:\: \:\: \:\: \:\: \:\: \:\: \:\: \:\:\:\: \:\:\: =150.5$

Hence, option (b) 150.5 is the correct answer.

Answer 2

Answer:

150.5

Step-by-step explanation:

n(n+1)/2

=300(300+1)/2

=150×301

=45150

=45150/300

=150.5