Question

 If the mean of the following observations is 40. find the value of x=? the observations: 30 , 48 , x , 51 , x-3​

Answer 1

Answer:

$30 + 48 +$

$30 + 48 + x + 51 + x - 3 \ \div 5 = 40 \: then \: weget \: value \: of \: x = 37$

Step-by-step explanation:

solve it

Answer 2

Step-by-step explanation:

mean = sum of observations/number of observations

40 = (30+48+x+51+(x-3))/5

40 = (129+2x-3)/5

200 = 126+2x

74 = 2x

x = 37