a) 63 kg
b) 69 kg
c) 741 kg
d) 73 kg
Answer: a
Explanation:
Average body weight
$$\eqalign{
& = {\frac{{54 + 78 + 43 + 82 + 67 + 42 + 75}}{7}} {\text{ kg}} \cr
& = {\frac{{441}}{7}} {\text{ kg}} = 63{\text{ kg}} \cr} $$
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