Question

9. If the mean of the scores x,
X+1, X+5, X+10, X+14 is 20, then
the value of xis​

Answer 1

Answer:

12.5

Step-by-step explanation:

Sum of obs. / Total no. of obs. = Mean

x+1+x+5+x+10+x+14 / 4 = 20

4x + 30 = 20 * 4

4x = 80-30

x = 50/4

x=12.5

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