Chemistry › Analogy › Question #4571
Single Choice Not Set

QWhat is the mean of the first 20 multiples of 7?

ID: #4571 Analogy 222 views
Question Info
#4571Q ID
Not SetDifficulty
AnalogyTopic
Start Quiz on This Topic
 Your Answer

Choose the Best Option

Click any option to instantly check if you're correct.

  • A 73.5 ✔ ✖
  • B 73.05 ✔ ✖
  • C 85.6 ✔ ✖
  • D 70.4 ✔ ✖
Correct Answer

Explanation


The average of the first 20 multiples of 
7 can be represented by the following equation:

Average = (7 * (1 + 2 + 3 + ... + 20)) / 20
= (7 * (20 * 21)) / (20 * 2)
= 1472 / 40
= 73.5

This equation first calculates the sum of the first 20 multiples of 7 by multiplying 7 by the sum of the first 20 natural numbers.
The sum is then divided by the total number of numbers to obtain the average, which is 73.5

 Continue Practice
Previous Question Next Question
 Share

Share This Question

Challenge a friend or share with your study group.

 More from This Topic

Related MCQ Questions

Find the relationship of the given analogy. Ragtime : United States:: Raga : ? What is the largest of the four consecutive even numbers whose average is 27? Complete the series with exact number: 100, 201, 303, 406, ___, 615. Complete the series with exact number: 26 : 3 :: __ : 2. [Note: The formule used here should be quadratic equa Find the same relationship of word. Fleet : trucks :: _____ : teachers. Complete the series with exact number: 6 : 40 :: 5 : __ Find the relationship between given analogy. Sound : cacophony :: Smell : ? If 50 is related to 0, then 16 is somewhere related to Complete the series with exact number: 1 : 1 :: 25 : __ Anthropology is related to man, then anthology is related to