Question

there are four different numbers.the average of the first three of them is four times the fourth number and the average.of all.the four number is 87.75.what is the average of first three numbers?​

Answer 1

first three number average =4 times the forth number

4th no =87.75

first three no = 87.75×4

first three no sum = 351.00.

first three no average = 351.00/3=117.00