The average of 5 numbers is 6.8. If one of the numbers is multiplied by a factor of 4, the average of the numbers increases to 9.2. What number is multiplied by 4?  Choose the correct choice from the following answers: A) 1.5 B) 3.0 C) 3.9 D) 4.0 E) 6.0
The average of 5 numbers is 6.8   The sum of 5 numbers will be 6.8 x 5 = 34   The average of 5 number after one of the number is multiplied by 4 is 9.2   The sum of the numbers will now be 9.2 x 5 = 46   So the sum has increased by  46-34= 
<gadget id="calculator"> 46-34</gadget>
<output>12</output>
12   Let the number multiplied by 4 be n   Then,   4n= n+12   or 3n = 12   or n = 4   Answer:- 4.0
<result>D</result>
The average of 5 numbers is 6.8. If one of the numbers is multiplied by a factor of 4, the average of the numbers increases to 9.2. What number is multiplied by 4?