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The average weight of a group of 75 girls was calculated as 47 kg. It was later discovered that the weight of one of the girls was read as 45 kg, whereas her actual weight was 25 kg. What is the actual average weight of the group of 75 girls? (Rounded off to two digits after decimal)
A)46.73 kg
B) 46.64 kg
C) 45.96 kg
D) Cannot be determined
E) None of these
Read Solution (Total 3)
-
- Average weight of 75 girls was 47
then
total weight=(75*47)=3525
1 of d girl weight was 25 but wrongly put as 25.
so 20 kg is the incresed weight.
now real total weight of 75 girls was=3525-20=3505
actual avg weight was 3505/75=46.73(a)
- 8 years agoHelpfull: Yes(17) No(0)
- 45-25=20/75=4/15=0.266
47-.266=46.73 - 7 years agoHelpfull: Yes(4) No(0)
- 46.73 is correct answer
- 6 years agoHelpfull: Yes(0) No(0)
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