Question

1ques-if the mean of 7,4,x and 10is 8 the value of x is​

Answer 1

$\bold{\huge{\fbox{\color{Orange}{Solution}}}}$

Arithmetic mean =

$\frac{sum \: of \: observation}{no \: of \: observtion}$

$= > \frac{7 + 4 + x + 10}{4} = 8 \\ = > 21 + x = 32 \\ = > x = 32 - 21 = 11 \\ = > x = 11$

Answer 2

Answer:

x = 11.

Step-by-step explanation:

Given:

Mean of 7,4,x,10 = 8

We know that,

Mean = Sum of observations/Number of observations

Sum of observations = 7 + 4 + x + 10 = 21 + x

Number of observations = 4

Hence, (21+x)/4 = 8

21 + x = 8(4)

21 + x = 32

x = 32 - 21

x = 11.

Hence, the value of x is 11.