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andrew11 [14]
3 years ago
9

The mean length of 10 childrens' big finger is 8.1cm.

Mathematics
1 answer:
sergiy2304 [10]3 years ago
8 0

Answer:

  • The mean length of 10 children's big finger is 8.1 cm

Average length of all the 10 children's finger is (8.1×10) cm = 81 cm.

  • The mean length of 11 adult's big finger is 14.1 cm

Average length of all the 11 adult's big finger is (14.1×11) cm =155.1

  • Mean length of these 21 people's big finger is
  • \frac{(81 + 155.1)}{21}  = 11.242857
  • Hence, <em><u>11.24</u></em> is the right answer.
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