plz solve from 11 to 14
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11. mean income of 3 members is 8000
total income is 8000×3= 24000
other person income is 10000
Total income is 34000
Mean income is 34000/4=8500
12. mean age of 6 persons is 14.5
Age of them in total is 14.5×6=87
Mean age of 4 persons is 13.25
Total age of them is 53
So 87-53=34
When age of 5th is 16 years
So 34-16=18
13.Total weight of 16 students is 16×40=640
When one boy weight 25 leaves the school 640-25=615
Now total 15 students r present
So 615/15=41
14.Total weight of 26 boys is 26×40=1040
Total weight of 14 girls is 14×35=490
So total weight of 40 students is 1040+490=1530
Mean weight is 1530/40=38.25
total income is 8000×3= 24000
other person income is 10000
Total income is 34000
Mean income is 34000/4=8500
12. mean age of 6 persons is 14.5
Age of them in total is 14.5×6=87
Mean age of 4 persons is 13.25
Total age of them is 53
So 87-53=34
When age of 5th is 16 years
So 34-16=18
13.Total weight of 16 students is 16×40=640
When one boy weight 25 leaves the school 640-25=615
Now total 15 students r present
So 615/15=41
14.Total weight of 26 boys is 26×40=1040
Total weight of 14 girls is 14×35=490
So total weight of 40 students is 1040+490=1530
Mean weight is 1530/40=38.25
amanjds07:
plz solve also 12,13 and 14
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