Question

20. If the mean of five observations
x, x + 4, x + 8, x + 12 and x + 16 is 15,
then the value of x is
(a) 5
(b) 6
(c) 7
(d) 8​

Answer 1

Answer:

x is 7

Step-by-step explanation:

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Answer 2

Answer:

ans) c)7

Step-by-step explanation:

Mean = Sum of observation/number of observation

=x,x+4,x+8,x+12,x+16/5=15

=15×5

=x+x+4+x+8+x+12+x+16=75

=5x+40=75

5x=75-40

5x=35

x=35/5

x=7

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