The mean of ten observation is x . if each observationhas been multiplied by 5 the mean will be........... Give me a proper answer
Answers
Answered by
7
Answer:
Let the observations be a
1 ,a 2 ,...,a 10
Given that, mean of the observations is 5
Therefore, 5= 10a 1+a 2 +...a 10
⟹a
1
+a
2
+...a
10
=50 -----(1)
Given that, 2 is added to each observation and multiplied by 3
Therefore, new mean=
10
(a
1
+2)3+(a
2
+2)3+...(a
10
+2)3
⟹new mean=
10
(a
1
+a
2
+...+a
10
)3+(10×2)3
⟹new mean=
10
(50)3+(20)3
⟹new mean=
10
210
=21
Answered by
0
Answer:
5x
Step-by-step explanation:
mean= sum of observation/no of observation
= 5x1 +5x2+5x3.......+5x10/10
=5(x1+x2+x3......+x10)/10
= 5x
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