Question

the mean of the four variete a,3,4 and 5 is 3. find the value of a.​

Answer 1

Answer:Mean=sum of observation/no. of observation

3=(a+3+4+5)/4

12= a+12

a=0

Hope it helps...

Step-by-step explanation:

Answer 2

Answer:

Hear is your answer

$mean = \frac{sum \: of \: observation}{number \: of \: observation}$

Step-by-step explanation:

1. $3 = \frac{(a + 3 + 4 + 5)}{4}$
2. $12 = a + 12$
3. $a = \frac{12}{12}$
4. $a = 0$