GIVEN :The average of 4-digit NUMBERS 1X44, x345, 3356 and 41x3 is 2767Formula used :Average = Total sum of all observations/ Number of observations Calculations :Average = Total value of all observations/4 2767 = Total value of all observations/4 Total value of all observations = 2767 × 4 = 11068 1x44 + x345 + 3356 + 41x3 = 11068 Now we should PUT value of x less than 3 as at x = 3 sum of these numbers will be more than 11068 At x = 2, values get SATISFIED Now average of 6x, 5x + 3 and 7x + 3 Average = (6x + 5x + 3 + 7x + 3)/3 ⇒ 42/3 = 14 ∴ The average will be 14