Question

People also ask What is the average of first 20 multiplesof 21?

Answer 1

Answer:

220.5

Step-by-step explanation:

Average means the sum of all units applying for the given condition, whole divided by the number of units added.

$= \frac{21 + 42 + 63 + 84 + 105 + 126 + 147 + 168 + 189 + 210 + 231 + 252 + 273 + 294 + 315 + 336 + 357 + 378 + 399 + 420}{20}$

Scroll ➡ this way for the complete equation.

$= \frac{4410}{20}$

= 220.5

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