Question

The average of four number is 12 and out of these
three numbers are 10, 14 and 16 then the 4th
number will be चार संख्याओं का औ

सत 12 है यदि तीन
संख्यायें 10,144 16 हो तो चौथी संख्या होगी।
(a) 10 (b) 12 (c)8 (d) कोई नहीं (None of thase)​

Answer 1

Answer

given

let the fourth number be x

three numbers are=10, 14, 16

average no.=12

Step-by-step explanation:

average of four number =sum of all number

$12 = (10 + 14 + 16 + x )\%4 \\ 12 \times 4 = 40 + x \\ 48 = 40 + x \\ x = 48 - 40 \\ x = 8$