following frequency distribution table shows the daily expenditure incurred on milk by 80 families. If the mean expenditure is Rs 44 then find threw missing frequencies
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Answered by
3
please provide the table
aayush2884:
0-10 , 10-20 , 20-30 , 30-40 , 40-50 , 50-60 , 60-70 , 70-80 , 80-90 is daily expenditure( in rupees) 1,12,15,9,x,13,y,8,4 is no. of families
x+y=18
Answered by
3
Answer:x=13
y=5
Step-by-step explanation:
Equating xifi/fi to 44, we get
(2610+45x+65y)/80=44
2610+45x+65y=3520
45x+65y=910 -eq1
We know that fi=80
62+x+y=80
x+y=18
45x+45y=810 -eq2
Subtracting eq2 from eq1 gives:
20y=100
y=5
x+y=18
x=18-y
x=18-5=13
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