Question
Find the mean of first $10$ even natural numbers.
✓
Answer
The first $10$ even natural numbers are $2, 4, 6, 8, 10, 12, 14, 16, 18$ and $20$.
Let $\bar{\text{x}}$ denote their arithmetic mean.
Then, $\bar{\text{x}} = (2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20) ÷ 10 = 110 ÷ 10 = 10$
Let $\bar{\text{x}}$ denote their arithmetic mean.
Then, $\bar{\text{x}} = (2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20) ÷ 10 = 110 ÷ 10 = 10$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Anuradha can do a piece of work in $6$ hours. What part of the work can she do in $1$ hour in $5$ hours in $6$ hours$?$
→Add the following expression: $p^2-q+r, q^2-r+p$ and $r^2-p+q$
→Identify the complementary and supplementary pairs of angles from the following pairs:
(i) $25^{\circ}, 65^{\circ}$
(ii) $120^{\circ}, 60^{\circ}$
(iii) $63^{\circ}, 27^{\circ}$
(iv) $100^{\circ}, 80^{\circ}$
→(i) $25^{\circ}, 65^{\circ}$
(ii) $120^{\circ}, 60^{\circ}$
(iii) $63^{\circ}, 27^{\circ}$
(iv) $100^{\circ}, 80^{\circ}$
Find the values of the unknowns $x$ and $y$ in the diagram :
→Two angles of a triangle are $30^{\circ}$ and $80^{\circ}$. Find the third angle.
→Find of the following products: $3 \times (-8) \times 5$
→Anamika thought of a number. She multiplied it by 2 , added 5 to the product and obtained 17 as the result. What is the number she had thought of?
For each of the following, give at least 5 possible values for the third length so there exists a triangle having these as sidelengths (decimal values could also be chosen):
(a) 2 and 8
(b) 7 and 12
(a) 2 and 8
(b) 7 and 12
Find
$1.2 \times 100$
→$1.2 \times 100$
If $40$ men can finish a piece of work in $60$ days, in how many days will $75$ men finish the same work$?$
→