Question

average of three numbers is 50.if two of these numbers are 54 and 56.find the average when a new number 60 is entered​

Answer 1

Answer:

52.5

Step-by-step explanation:

Let one of the three numbers be x, then, we have 54+56+x/3 = 50

Thus, 54+56+x = 50*3 = 150

= 54 + x = 150 - 56 = 94, or, x = 94 - 54 = 40.

Therefore, the average with 60 = 54 + 56 + 40 + 60/4 = 210/4 = 52.5