26 A distribution consists of three groups having
40, 50 and 60 items with means 20, 26 and 15
respectively. The mean of the distribution is:
Answers
Answered by
2
Step-by-step explanation:
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Answered by
0
Step-by-step explanation:
Given, f
1
=45, f
2
=40, f
3
=15, x
1
=2, x
2
=2.5 and x
3
=2
Now, mean =
f
1
+f
2
+f
3
x
1
f
1
+x
2
f
2
+x
3
f
3
=
45+40+15
45×2+40×2.5+15×2
=
100
90+100+30
=
90
220
=2.2
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