Question

if the average of 5,10,20,25 and x is 15, then what is the value of x ?​

Answer 1

Answer:

5+10+20+25+x =15×5

60+x =75

x =75-60

x =15

I am sorry if I am wrong

Answer 2

Answer:

Average = sum of observed data / number of observed data.

\begin{gathered} \frac{(5 + 10 + 15 + x)}{4} = 20 \\ \frac{(30 + x)}{4} = 20 \\ (30 + x) = 20 \times 4 \\ 30 + x = 80 \\ x = 80 - 30 = 50 \\ \\ x = 50\end{gathered}

4

(5+10+15+x)

=20

4

(30+x)

=20

(30+x)=20×4

30+x=80

x=80−30=50

x=50