Question

We compunen Statements of Al prime numbers are either even or odd.
The average of four numbers is 80. If first three numbers are 80, 90 and 100, find the fourth
number​

Answer 1

Step-by-step explanation:

let the fourth number be x

(80 + 90 + 100 + x)/4 = 80

(270 + x)/4 = 80

270 + x = 80 × 4

270 + x = 320

x = 320 - 270

x = 50

hence, the fourth number is 50