hi friends pls just answer 4th question pls
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Answer:
the answer is
Step-by-step explanation:
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Step-by-step explanation:
mean=sum of observation/no.of observation
1)(1/2+3)/2=(7/2)/2=7/4
2)(3/4+1/3)/2=(13/12)2=13/24
3)(-7/2+5/4)/2=(-9/4)/2=-9/8
4)(-8/5+7/9)/2=(-37/45)/2=-37/90
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