The average of 5 numbers is 6.8. If one of the numbers is multiplied by a factor of 2, the average of the numbers increases to 9.2. What number is multiplied by 2?
Answers:
A) 12.0
B) 30.0
C) 30.9
D) 40.0
E) 60.0
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 2 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 2 be n   Then,   2n= n+12= 
<gadget id="calculator">+12</gadget>
<output>12</output>
12   12.0nswer:- 12.0
<result>A</result>
The average of 5 numbers is 6.8. If one of the numbers is multiplied by a factor of 2, the average of the numbers increases to 9.2. What number is multiplied by 2?