Mean of four observations is 12. If first, second, third and fourth observations are
decreased by 1, 2, 3 and 4 respectively, then find the new mean. (Ans. New Mean = 9.5
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Answered by
1
Answer:
x-1+x-2+x-3+x-4÷4=12
x-1+x-2+x-3+x-4=12×4
4x-10=48
4x=48-10=38
x=38÷4
x=9.5
Answered by
0
Answer:
9.5
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