Question

If the mean of 5 observation ( x + 1 ),( x + 2 ), ( x + 3) ( x + 4 ) and ( x + 5 ) is 25. find the mean of first four observations​

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

X+1+x+2+x+3+x+4+x+5 / 5 = 25

2x+15 = 125

2x = 125-15

2x = 110

X=55

First 4 no. are, x+1 = 55+1=56

X+2=55+2=57

X+3=55+3=58

X+4=55+4=59

Mean =56+ 57+58+59 / 4

230/4 = 57.5

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