Question

find the value of no
The mean of 18,24,15, 2x-1 and 12 is 21 find value of x​

Answer 1

Mean = sum of the terms / the number of terms

(18+24+15+2x-1+12)/5 = 21

(68+2x) = 105

2x = 37

x = 37/2

x = 18.5

:-)

Answer 2

Answer:

x = 18.5

Step-by-step explanation:

Mean = sum of observation / total number of observation

21 = 18 + 24 + 15 + 2x-1 + 12 / 5

21 × 5 = 68 + 2x

105 - 68 = 2x

37/2 = x

18.5 = x