Question

Herbert has sold 92, 28, 83 and 75 suits in the last four months, respectively. How many suits will he need to sell this month to maintain an average of at least 71 sales per month? ​

Answer 1

4 month



Find the average of last 4 month
Find mean
Sum of Numbers divided by the count of numbers

92+ 28+ 28 +75 divided 4
278 divided by 4
69.5

If 4month = 69.5
x. =. 71

Cross multiply

69.5x =71 *4
69.5x.= 284
Divide both side by x
x= 284 / 69.5
x= 4.08 to whole number
x = 4 months

Answer 2

Answer: 77 suits

Explanation:

Let sales of this month = x

Sales for last 4 months = 92, 28, 83, 75

Average = Sum of Observation ÷ No of Observation

Now, we can form an equation

(92+28 +83+75+x) ÷ 5 =71

(92+28 +83+75+x) = 71 × 5

278 + x = 355

x = 355 - 278

x = 77