Question

The mean of five observations is 21. If 14,23,25 and 17 are four observations , find the fifth observation.​

Answer 1

Step-by-step explanation:

let the fifth observation be x

so, x+14+23+25+17= 79+x

mean = 21 (given)

=> 79+x / 5 = 21

=> 79+x = 105

=> x = 105-79

=> x = 26

Hence, the fifth observation is 26

Answer 2

Answer:

26

Step-by-step explanation:

let fifth observation = X

we know that mean=sum of observation/number of observation

(14+23+25+17+X)/5=21

79+X=105

X=26

therefore,fifth observation=26